Want to create or adapt books like this? Learn more about how Pressbooks supports open publishing practices.

Traveling waves

17 How sound moves

Speed of sound.

There’s a delay between when a sound is created and when it is heard. In everyday life, the delay is usually too short to notice. However, the delay can be noticeable if the distance between source and detector is large enough. You see lightning before you hear the thunder. If you’ve sat in the outfield seats in a baseball stadium, you’ve experienced the delay between seeing the player hit the ball and the sound of the “whack.” Life experiences tell us that sound travels fast, but not nearly as fast as light does. Careful experiments confirm this idea.

The speed of sound in air is roughly 340 m/s. The actual value depends somewhat on the temperature and humidity. In everyday terms, sound travels about the length of three and a half foot ball fields every second- about 50% faster than a Boeing 747 (roughly 250 m/s). This may seem fast, but it’s tiny compared to light, which travels roughly a million times faster than sound (roughly 300,000,000 m/s).

Sound requires some material in which to propagate (i.e. travel). This material sound travels through is called the medium . You can show that sound requires a medium by putting a cell phone inside a glass jar connected to a vacuum pump. As the air is removed from the jar, the cell phone’s ringer gets quieter and quieter. A youTube video (2:05 min) produced by the UNSW PhysClips project shows the demo with a drumming toy monkey [1] instead of a cell phone.

What affects the speed of sound?

Sound travels at different speeds though different materials. The physical properties of the medium are the only factors that affect the speed of sound- nothing else matters.

The speed of sound in a material is determined mainly by two properties- the stiffness of the material and the density of the material. Sound travels fastest through materials that are stiff and light. In general, sound travels fastest through solids, slower through liquids and slowest through gasses. (See the table on this page). This may seem backwards- after all, metals are quite dense. However, the high density of metals is more than offset by far greater stiffness (compared to liquids and solids).

The speed of sound in air depends mainly on temperature. The speed of sound is 331 m/s in dry air at 0 o Celsius and increases slightly with temperature- about 0.6 m/s for every 1 o Celsius for temperatures commonly found on Earth. Though speed of sound in air also depends on humidity, the effect is tiny- sound travels only about 1 m/s faster in air with 100% humidity air at 20 o C than it does in completely dry air at the same temperature.

Nothing else matters

The properties of the medium are the only factors that affect the speed of sound- nothing else matters.

Frequency of the sound does not matter- high frequency sounds travel at the same speed as low frequency sounds. If you’ve ever listened to music, you’ve witnessed this-  the low notes and the high notes that were made simultaneously reach you simultaneously, even if you are far from the stage. If you’ve heard someone shout from across a field, you’ve noticed that the entire shout sound (which contains many different frequencies at once) reaches you at the same time. If different frequencies traveled at different rates, some frequencies would arrive before others.

The amplitude of the sound does not matter- loud sounds and quiet ones travel at the same speed. Whisper or yell- it doesn’t matter. The sound still takes the same amount of time to reach the listener.  You’ve probably heard that you can figure out how far away the lightning by counting the seconds between when you see lightning and hear thunder. If the speed of sound depended on loudness, this rule of thumb would have to account for loudness- yet there is nothing in the rule about loud vs. quiet thunder. The rule of thumb works the same for all thunder- regardless of loudness . That’s because the speed of sound doesn’t depend on amplitude.

Stop to thinks

  • Which takes longer to cross a football field: the sound of a high pitched chirp emitted by a fruit bat or the (relatively) low pitched sound emitted by a trumpet?
  • Which sound takes longer to travel 100 meters: the sound of a snapping twig in the forest or the sound of a gunshot?
  • Which takes longer to travel the distance of a football field: the low pitched sound of a whale or the somewhat higher pitched sound of a human being?

Constant speed

Sound travels at a constant speed. Sound does not speed up or slow down as it travels (unless the properties of the material the sound is going through changes). I know what you’re thinking- how is that possible? Sounds die out as they travel, right? True. That means sounds must slow down and come to a stop, right? Wrong. As sound travels, its amplitude decreases- but that’s not the same thing as slowing down. Sound (in air) covers roughly 340 meters each and every second, even as its amplitude shrinks. Eventually, the amplitude gets small enough that the sound is undetectable. A sound’s amplitude shrinks as it travels, but its speed remains constant.

The basic equation for constant speed motion (shown below) applies to sound.

[latex]d=vt[/latex]

In this equation, [latex]d[/latex] represents the distance traveled by the sound, [latex]t[/latex] represents the amount of time it took to go that distance and [latex]v[/latex] represents the speed.

Rule of thumb for lightning example

Example: thunder and lightning.

The rule of thumb for figuring out how far away a lightning strike is from you is this:

Count the number of seconds between when you see the lightning and hear the thunder. Divide the number of seconds by five to find out how many miles away the lightning hit.

According to this rule, what is the speed of sound in air? How does the speed of sound implied by this rule compare to 340 m/s?

Identify important physics concept :   This question is about speed of sound.

List known and unknown quantities (with letter names and units):

At first glance, it doesn’t look like there’s enough information to solve the problem. We were asked to find speed, but not given either a time or a distance. However, the problem does allow us to figure out a distance if we know the time- “Divide the number of seconds by five to find out how many miles away the lightning hit.” So, let’s make up a time and see what happens; if the time is 10 seconds, the rule of thumb says that the distance should be 2 miles.

[latex]v= \: ?[/latex]

[latex]d=2 \: miles[/latex]

[latex]t=10 \: seconds[/latex]

You might ask “Is making stuff up OK here?” The answer is YES! If the rule of thumb is right, it should work no matter what time we choose. (To check if the rule is OK, we should probably test it with more than just one distance-time combination, but we’ll assume the rule is OK for now).

Do the algebra:  The equation is already solved for speed. Move on to the next step.

Do unit conversions (if needed) then plug in numbers:  If you just plug in the numbers, the speed comes out in miles per second:

[latex]v = \frac{2 \: miles} {10 \: seconds}=0.2 \: \frac{miles} {second}[/latex]

We are asked to compare this speed to 340 m/s, so a unit conversion is in order; since there are 1609 meters in a mile:

[latex]v =0.2 \: \frac{miles} {second}*\frac{1609 \: meters} {1 \:mile}=320 \frac{m}{s}[/latex]

Reflect on the answer:

  • The answer for speed from the rule of thumb is less than 10% off the actual value of roughly 340 m/s- surprisingly close!
  • At the beginning, we assumed a time of 10 seconds. Does the result hold up for other choices? A quick check shows that it does! For instance, if we use a time of 5 seconds, the rule of thumb gives a distance of 1 mile, and the math still gives a speed of 0.2 miles/second. The speed will be the same no matter what time we pick. The reason is this:  The more time it takes the thunder to arrive, the farther away the lightning strike is, but the speed remains the same. In the equation for speed, both time and distance change by the same factor and the overall fraction remains unchanged.

Stop to think answers

  • Both sounds take the same amount of time. (High and low pitched sounds travel at the same speed).
  • Both sounds take the same amount of time. (Quiet sounds and loud sounds travel at the same speed).
  • The sound of the whale travels the distance in less time- assuming sound from the whale travels in water and sound from the human travels in air. Sound travels faster in water than in air. (The info about frequency was given just to throw you off- frequency doesn’t matter).
  • Wolfe, J. (2014, February 20). Properties of Sound. Retrieved from https://www.youtube.com/watch?v=P8-govgAffY ↵

Understanding Sound Copyright © by dsa2gamba and abbottds is licensed under a Creative Commons Attribution 4.0 International License , except where otherwise noted.

Share This Book

Sound Goblin

How Sound Travels Through Solids, Liquids and Gases

Default image

  • August 13, 2022

We love to work with sound. Many of us record our own music, podcast, or other forms of sound. Knowing how sound travels through different mediums will allow you to have better control over the sound that you generate. That is what we will be looking at today. How does sound travel through solids, liquids, and gases? 

Can the way that you produce sound and the medium that it moves in make a difference in the volume that you will hear? How does this change when it comes to the different mediums? Will the furniture in a room have any impact on the acoustics of the room? How can you change it to create the perfect recording environment? 

These are just some of the things that we will discuss today. Knowing how sound travels through solids, liquids and gases are not only interesting, but it can have an impact on the way we record sounds and how we change things up. 

Why Is the Way That Sound Travels Through Mediums Important? 

One of the main reasons why it is important to understand how sound acts, is that when you understand something better, you can control it. As a youngster, I loved swimming. I still do. But one of my main attractions was that underneath the water it was the one place where everything went quiet. It always felt like the world stopped and it was just me and complete calm. 

I loved my family but there was always so much going on that it was just a great place to just be with my own imagination and thoughts. I could make up imaginary worlds and people, and have millions of stories running through my mind. All because there was a lack of sound under the water. 

But in reality, when you look at how sound behaves in a liquid, scientifically, this should not be the case. In fact, there should be more sound under the water than there is in the fresh air. Why? And why doesn’t it work that way? I wanted to find out. 

For many of us who record sound, it is important to be connected to it. If you understand what makes something sound fuller, what makes a noise loud, and how things act, you can have better control and your recording will end up being closer to what you intended in the first place. 

You might be recording a podcast, but for some reason, your voice keeps sounding muffled, understanding sound can help you identify what the cause could be and how you can fix it. 

What Is Sound? 

To understand why sound acts differently in different mediums we first have to understand what sound is. 

First, you need to know that sound can not exist in a void. This is different from light that does travel through nothingness. That is why we can see light shining from space where there is a void and no atmosphere. But those that have been to space say it is completely quiet. It must be an almost eerie feeling. 

Sound happens when something creates a vibration. This is done through musical instruments, our voices, speakers, and many other things. This then causes the medium around it, like the water or the air, to also vibrate and carry this sound with them. Without a medium, sound would not exist. That is because the molecules of the medium react and bump into those next to it and this allows the sound to travel on. 

At the same time, the medium that is used will determine just how loud the sound will be, it will also determine how far can travel and how the sound will generally react. This is because different solutions will have molecules that are more or less densely packed. 

Your surroundings will have a big impact. People who create a sound studio try to make the acoustics of the room as powerful as possible. This should help you do that. 

Let us now look at the three mediums that sound can travel through, solids, liquids, and gases, and how they change the reaction of the sound. 

First up we can look at gasses. You might wonder why gasses are mentioned when speaking of mediums that sound can move in. You may be visualizing a bunch of fog at a concert that makes the lights look incredible and makes the crowd go wild. 

And that is one possibility of gasses that can be used as a medium for sound to travel through. But most of the time, our air is the only gas that sound needs to continue its vibration. 

What Is the Air Made Of? 

We have already mentioned that sound can not exist in a void. But we can hear each other when we speak out in the open. We can hear music when it is being played under the starry sky and we can even hear kids shouting in a park a block away . 

That is because most of the air in our atmosphere is made up of gasses. Our atmosphere is not just a void, or we wouldn’t be able to live here anyway, but is made up of lots of gasses we can’t see. The atmosphere is made up of 78% Nitrogen, and 21% Oxygen, and the rest is a mixture of carbon dioxide, neon, and hydrogen. 

This gives us all the ability to breathe without needing a space suit, but it also gives sound the ability to travel in our atmosphere. We make a vibration and the molecules of the gases that we can’t even see start to bump into each other and takes that vibration further, making it possible for us to hear sounds. It is pretty amazing when you think about it. 

How Does Sound Travel Through Gases? 

Gas is the medium that will have the slowest speed of sound of all of them. This is because the molecules of the gases surrounding us are expanded and far away from each other. The vibrations do get passed over to each other but it takes longer to do. 

This is also why we often need things that can amplify our sounds like a microphone when we are speaking to a bigger group of people. These help us to make the vibrations bigger and to allow them to travel further than we would have been able to achieve with only our voice. 

Some Things That Can Influence Sound in Gases 

Have you ever felt that things are so much quieter after a big snowstorm? How the world seems almost different then? Turns out it might not just be your imagination. This is because the volume and speed of sound can be impacted by the temperature of the air and in turn the gas that is surrounding us. 

At lower temperatures, the molecules move around quicker and they can vibrate quicker. The energy behind the sound can start to be lost and the sound will become quieter or be lost faster. 

At normal room temperatures, the speed of sound will be a lot higher than it would be in the exact same room when the temperature is at freezing. 

There are many different liquids that have a higher or lower density but for the most part, it is in water where we would be interested in hearing a sound. If we go swimming or put a small portable speaker close to the water, we would like to hear the sound as loud as possible. But it just doesn’t always work like that. 

Let’s see how sound reacts in water or other liquids. 

Sound In Water 

The molecules in water are a lot more tightly packed than it is in gas. That is why sound travels much faster in water than it would travel in the air. Sound can actually travel in water almost four times faster than it can be in the air. 

That is really impressive. And still, if you submerge your head underwater, you will hear the sound but it might sound muffled and not quite like the sound that you are used to. 

Why Humans Hear Muffled Sounds in Water 

The water molecules are more tightly packed and the energy that it uses to carry sound is transported faster. In theory, you should be able to hear noises a lot louder when you are underwater. But that is not how we perceive this sound. 

This is because our ears are created to listen to sounds in the air. We pick up on sounds through our ear canal and these sounds are then transported to the brain that makes sense of it all. When you only submerge your ears, sounds will sound very muffled since the ears can’t take these sounds along the ear canal. 

When you submerge your head fully suddenly the sound is clearer and louder. Although it could still be somewhat muffled compared to outside the water. Our heads contain a lot of water, and inside the water, it will be our tissue that picks up on the sound and detects it. 

You could try to plug your ears but it will have very little effect on the volume of the noise under the water. The sound is not traveling along those normal lines. 

At the same time, chances are that it is also very hard and almost impossible for you to figure out from which direction the sound is coming. When the sound travels along the normal route our brain has cues to determine if it comes from behind us or in front. But when the sound does not travel in those normal routes the brain has no way of telling us where it is coming from. 

For humans communicating through sound under the water is not so easy. That is why divers have always used hand signals to communicate with their diving partners and why some have even started to use microphones that connect them. Allowing for a much better communication route. 

We know that we can’t hear sound in the same way when we are inside water as when we are in the air. But what happens when we make a big sound inside the water, like shouting? Will someone that is on the outside be able to hear it clearly? 

This is unlikely. That is because the surface of the water almost acts as a mirror for sound. Instead of the vibration moving outside of the water it gets reflected back. Making sure that very little sound is heard outside. 

Animals In Water 

Our ears might be designed to hear in air, but fish and mammals that live in the ocean can take advantage of the speed of sound inside the water. They are adapted to hearing noise completely clearly inside the water. 

Since sound does travel quickly in water and they can hear it, they can use sounds to communicate over much larger distances than we are able to do with just our voice. Whales, for example, have been known to use their voice to communicate with other whales over massive distances in the ocean. The sound of a humpback whale can travel thousands of miles in the ocean.  It also helps that the vibrations they can create are much larger than the ones our own vocal cords can produce. 

Then finally there are solids and how sound reacts when they come into contact with a solid. Since sound starts to get muffled when there are a lot of solid objects in its path you would think that it travels a lot slower in solids. But surprisingly that is not the case. There are however reasons why it reacts in this way. 

The Speed of Sound in Solids 

A solid object is densely packed with its molecules. Each solid object will be a little bit different from the other depending on the material it is made of and how densely packed its molecules are. There are some materials that will work better as insolation to noise than others, but we will discuss the reason for this shortly. But for the most part, sound will travel a lot faster in solids than it will in both liquids and gasses.

This is because the source of the sound will create the vibration in the molecules of the sound and then these tightly packed molecules will quickly send the vibration further along. This means that the speed of sound is a lot faster when traveling in a solid object and that it will be a lot louder too. 

Often a solid object will be a good source of amplification for a sound that you would like to enhance. The sound through a brass bugle gets enhanced through the design of the object and also through the material it is made of.

Examples Of Sounds in Solids 

It can be hard to think of examples where solid objects are used to move sound and make it louder. Let’s discuss some simple examples of this. 

You can put an ear to a solid object like a table and then make a soft tapping sound on the table. Compare how you heard it when your ear is on the solid compared to how loud it is when you hear the sound through the air. You will be surprised by how clearly the sound is enhanced by listening to it through a solid object. 

Another great example of an experiment that many of us probably unknowingly did as children is a string telephone. You take two cups and a long line of string. The two cups are each connected to one side of the string, one person listens into one cup while another speaks into the cup at their end. 

In this experiment, the vibrations are created and enhanced by the shape of the cup. Then these vibrations are transferred with the help of a solid object, the string, and the other person can hear your message at the other end of the string. Without raising your voice or shouting. 

It is always amazing to see just how far this simple design can carry sound. Fun fact, the world record for the longest-ever string telephone, which was made with tin cans, was a whopping 796 feet long. That is almost the distance of three football fields. That is a long way for a piece of string and two cups to carry sound. 

Then another great example of a sound being a lot louder when it is carried through a solid object is sounds that you can hear in the air. For example, hearing the sound of a horse coming closer, its hooves beating down on the ground. 

It is already a pretty impressive sound when you hear it in normal circumstances. But try putting your head to the ground and listening to the approach in that way. The sound is much louder and you can almost feel the vibrations that are making the sound you hear. 

Why Does Sound Get Muffled Through a Door? 

We know now that sound travels much faster through solid objects than it does through gasses or liquids. You would think that a solid object like a wall or a door will enhance the sound but the opposite is true. A sound that is coming from a different room is more muffled. 

If there is a lot of noise outside your home, for example, the neighbors having a party, it works to close the doors and windows and the sound won’t bother you as much. Even if you only have standard windows and doors. 

How does that work? It works because the sound you are hearing does not originate from inside a solid object. It traveled through the air until it came to your door. There it encountered a solid object. And instead of making the vibrations louder this change in medium made the sound lose some of the energy that it was traveling with. This reduces the level of the noise and makes it less noticeable when there are doors that are closed. 

Why Rooms Echo 

This change in energy is also one of the reasons why a room will or won’t echo. When you go into an empty room there is a good chance that you can create an echo. That is because the empty room has no solid objects that break the energy of the noise down and stop it. 

The vibrations bump only against the walls and reflect back. If you have a room that is still echoing even after your furniture has been installed, then there might not be enough solid objects that stop the speed and the energy of the sound. Something like a carpet that can absorb the vibration can help to stop the echo in the room. 

How Sound Travels Through Solids, Liquids, and Gases 

Sound needs a medium that can take the vibrations and move them along, allowing us to hear the sounds that are being created. 

When it comes to the speed of sound, a solid object will allow the vibration to move much faster since it has the most densely packed molecules. It will also make the sound the loudest. After solids, liquids have the highest speed of sound. And then finally gas, that included our air since it is made up of gasses. 

When a sound is traveling through one medium like air and then encounters another, like a solid door, it loses some of its energy and some of the volume will be lost. That is why solid insulation against sound is still one of the best options despite solids being a good conductor of sound. 

We might not be able to take full advantage of the high speed of sound that can be found inside a liquid, but those living in the ocean sure can and that is why whale sounds can travel thousands of miles under the water. 

Knowing how sound reacts to different mediums will allow us to understand it better. And that means that you should have better control over your recordings and all the ways that you like to create your own very unique sounds.

Leave a Reply Cancel Reply

Add Comment

Save my name, email, and website in this browser for the next time I comment.

Post Comment

Youtube

  • TPC and eLearning
  • Read Watch Interact
  • What's NEW at TPC?
  • Practice Review Test
  • Teacher-Tools
  • Subscription Selection
  • Seat Calculator
  • Ad Free Account
  • Edit Profile Settings
  • Classes (Version 2)
  • Student Progress Edit
  • Task Properties
  • Export Student Progress
  • Task, Activities, and Scores
  • Metric Conversions Questions
  • Metric System Questions
  • Metric Estimation Questions
  • Significant Digits Questions
  • Proportional Reasoning
  • Acceleration
  • Distance-Displacement
  • Dots and Graphs
  • Graph That Motion
  • Match That Graph
  • Name That Motion
  • Motion Diagrams
  • Pos'n Time Graphs Numerical
  • Pos'n Time Graphs Conceptual
  • Up And Down - Questions
  • Balanced vs. Unbalanced Forces
  • Change of State
  • Force and Motion
  • Mass and Weight
  • Match That Free-Body Diagram
  • Net Force (and Acceleration) Ranking Tasks
  • Newton's Second Law
  • Normal Force Card Sort
  • Recognizing Forces
  • Air Resistance and Skydiving
  • Solve It! with Newton's Second Law
  • Which One Doesn't Belong?
  • Component Addition Questions
  • Head-to-Tail Vector Addition
  • Projectile Mathematics
  • Trajectory - Angle Launched Projectiles
  • Trajectory - Horizontally Launched Projectiles
  • Vector Addition
  • Vector Direction
  • Which One Doesn't Belong? Projectile Motion
  • Forces in 2-Dimensions
  • Being Impulsive About Momentum
  • Explosions - Law Breakers
  • Hit and Stick Collisions - Law Breakers
  • Case Studies: Impulse and Force
  • Impulse-Momentum Change Table
  • Keeping Track of Momentum - Hit and Stick
  • Keeping Track of Momentum - Hit and Bounce
  • What's Up (and Down) with KE and PE?
  • Energy Conservation Questions
  • Energy Dissipation Questions
  • Energy Ranking Tasks
  • LOL Charts (a.k.a., Energy Bar Charts)
  • Match That Bar Chart
  • Words and Charts Questions
  • Name That Energy
  • Stepping Up with PE and KE Questions
  • Case Studies - Circular Motion
  • Circular Logic
  • Forces and Free-Body Diagrams in Circular Motion
  • Gravitational Field Strength
  • Universal Gravitation
  • Angular Position and Displacement
  • Linear and Angular Velocity
  • Angular Acceleration
  • Rotational Inertia
  • Balanced vs. Unbalanced Torques
  • Getting a Handle on Torque
  • Torque-ing About Rotation
  • Properties of Matter
  • Fluid Pressure
  • Buoyant Force
  • Sinking, Floating, and Hanging
  • Pascal's Principle
  • Flow Velocity
  • Bernoulli's Principle
  • Balloon Interactions
  • Charge and Charging
  • Charge Interactions
  • Charging by Induction
  • Conductors and Insulators
  • Coulombs Law
  • Electric Field
  • Electric Field Intensity
  • Polarization
  • Case Studies: Electric Power
  • Know Your Potential
  • Light Bulb Anatomy
  • I = ∆V/R Equations as a Guide to Thinking
  • Parallel Circuits - ∆V = I•R Calculations
  • Resistance Ranking Tasks
  • Series Circuits - ∆V = I•R Calculations
  • Series vs. Parallel Circuits
  • Equivalent Resistance
  • Period and Frequency of a Pendulum
  • Pendulum Motion: Velocity and Force
  • Energy of a Pendulum
  • Period and Frequency of a Mass on a Spring
  • Horizontal Springs: Velocity and Force
  • Vertical Springs: Velocity and Force
  • Energy of a Mass on a Spring
  • Decibel Scale
  • Frequency and Period
  • Closed-End Air Columns
  • Name That Harmonic: Strings
  • Rocking the Boat
  • Wave Basics
  • Matching Pairs: Wave Characteristics
  • Wave Interference
  • Waves - Case Studies
  • Color Addition and Subtraction
  • Color Filters
  • If This, Then That: Color Subtraction
  • Light Intensity
  • Color Pigments
  • Converging Lenses
  • Curved Mirror Images
  • Law of Reflection
  • Refraction and Lenses
  • Total Internal Reflection
  • Who Can See Who?
  • Formulas and Atom Counting
  • Atomic Models
  • Bond Polarity
  • Entropy Questions
  • Cell Voltage Questions
  • Heat of Formation Questions
  • Reduction Potential Questions
  • Oxidation States Questions
  • Measuring the Quantity of Heat
  • Hess's Law
  • Oxidation-Reduction Questions
  • Galvanic Cells Questions
  • Thermal Stoichiometry
  • Molecular Polarity
  • Quantum Mechanics
  • Balancing Chemical Equations
  • Bronsted-Lowry Model of Acids and Bases
  • Classification of Matter
  • Collision Model of Reaction Rates
  • Density Ranking Tasks
  • Dissociation Reactions
  • Complete Electron Configurations
  • Enthalpy Change Questions
  • Equilibrium Concept
  • Equilibrium Constant Expression
  • Equilibrium Calculations - Questions
  • Equilibrium ICE Table
  • Ionic Bonding
  • Lewis Electron Dot Structures
  • Line Spectra Questions
  • Measurement and Numbers
  • Metals, Nonmetals, and Metalloids
  • Metric Estimations
  • Metric System
  • Molarity Ranking Tasks
  • Mole Conversions
  • Name That Element
  • Names to Formulas
  • Names to Formulas 2
  • Nuclear Decay
  • Particles, Words, and Formulas
  • Periodic Trends
  • Precipitation Reactions and Net Ionic Equations
  • Pressure Concepts
  • Pressure-Temperature Gas Law
  • Pressure-Volume Gas Law
  • Chemical Reaction Types
  • Significant Digits and Measurement
  • States Of Matter Exercise
  • Stoichiometry - Math Relationships
  • Subatomic Particles
  • Spontaneity and Driving Forces
  • Gibbs Free Energy
  • Volume-Temperature Gas Law
  • Acid-Base Properties
  • Energy and Chemical Reactions
  • Chemical and Physical Properties
  • Valence Shell Electron Pair Repulsion Theory
  • Writing Balanced Chemical Equations
  • Mission CG1
  • Mission CG10
  • Mission CG2
  • Mission CG3
  • Mission CG4
  • Mission CG5
  • Mission CG6
  • Mission CG7
  • Mission CG8
  • Mission CG9
  • Mission EC1
  • Mission EC10
  • Mission EC11
  • Mission EC12
  • Mission EC2
  • Mission EC3
  • Mission EC4
  • Mission EC5
  • Mission EC6
  • Mission EC7
  • Mission EC8
  • Mission EC9
  • Mission RL1
  • Mission RL2
  • Mission RL3
  • Mission RL4
  • Mission RL5
  • Mission RL6
  • Mission KG7
  • Mission RL8
  • Mission KG9
  • Mission RL10
  • Mission RL11
  • Mission RM1
  • Mission RM2
  • Mission RM3
  • Mission RM4
  • Mission RM5
  • Mission RM6
  • Mission RM8
  • Mission RM10
  • Mission LC1
  • Mission RM11
  • Mission LC2
  • Mission LC3
  • Mission LC4
  • Mission LC5
  • Mission LC6
  • Mission LC8
  • Mission SM1
  • Mission SM2
  • Mission SM3
  • Mission SM4
  • Mission SM5
  • Mission SM6
  • Mission SM8
  • Mission SM10
  • Mission KG10
  • Mission SM11
  • Mission KG2
  • Mission KG3
  • Mission KG4
  • Mission KG5
  • Mission KG6
  • Mission KG8
  • Mission KG11
  • Mission F2D1
  • Mission F2D2
  • Mission F2D3
  • Mission F2D4
  • Mission F2D5
  • Mission F2D6
  • Mission KC1
  • Mission KC2
  • Mission KC3
  • Mission KC4
  • Mission KC5
  • Mission KC6
  • Mission KC7
  • Mission KC8
  • Mission AAA
  • Mission SM9
  • Mission LC7
  • Mission LC9
  • Mission NL1
  • Mission NL2
  • Mission NL3
  • Mission NL4
  • Mission NL5
  • Mission NL6
  • Mission NL7
  • Mission NL8
  • Mission NL9
  • Mission NL10
  • Mission NL11
  • Mission NL12
  • Mission MC1
  • Mission MC10
  • Mission MC2
  • Mission MC3
  • Mission MC4
  • Mission MC5
  • Mission MC6
  • Mission MC7
  • Mission MC8
  • Mission MC9
  • Mission RM7
  • Mission RM9
  • Mission RL7
  • Mission RL9
  • Mission SM7
  • Mission SE1
  • Mission SE10
  • Mission SE11
  • Mission SE12
  • Mission SE2
  • Mission SE3
  • Mission SE4
  • Mission SE5
  • Mission SE6
  • Mission SE7
  • Mission SE8
  • Mission SE9
  • Mission VP1
  • Mission VP10
  • Mission VP2
  • Mission VP3
  • Mission VP4
  • Mission VP5
  • Mission VP6
  • Mission VP7
  • Mission VP8
  • Mission VP9
  • Mission WM1
  • Mission WM2
  • Mission WM3
  • Mission WM4
  • Mission WM5
  • Mission WM6
  • Mission WM7
  • Mission WM8
  • Mission WE1
  • Mission WE10
  • Mission WE2
  • Mission WE3
  • Mission WE4
  • Mission WE5
  • Mission WE6
  • Mission WE7
  • Mission WE8
  • Mission WE9
  • Vector Walk Interactive
  • Name That Motion Interactive
  • Kinematic Graphing 1 Concept Checker
  • Kinematic Graphing 2 Concept Checker
  • Graph That Motion Interactive
  • Two Stage Rocket Interactive
  • Rocket Sled Concept Checker
  • Force Concept Checker
  • Free-Body Diagrams Concept Checker
  • Free-Body Diagrams The Sequel Concept Checker
  • Skydiving Concept Checker
  • Elevator Ride Concept Checker
  • Vector Addition Concept Checker
  • Vector Walk in Two Dimensions Interactive
  • Name That Vector Interactive
  • River Boat Simulator Concept Checker
  • Projectile Simulator 2 Concept Checker
  • Projectile Simulator 3 Concept Checker
  • Hit the Target Interactive
  • Turd the Target 1 Interactive
  • Turd the Target 2 Interactive
  • Balance It Interactive
  • Go For The Gold Interactive
  • Egg Drop Concept Checker
  • Fish Catch Concept Checker
  • Exploding Carts Concept Checker
  • Collision Carts - Inelastic Collisions Concept Checker
  • Its All Uphill Concept Checker
  • Stopping Distance Concept Checker
  • Chart That Motion Interactive
  • Roller Coaster Model Concept Checker
  • Uniform Circular Motion Concept Checker
  • Horizontal Circle Simulation Concept Checker
  • Vertical Circle Simulation Concept Checker
  • Race Track Concept Checker
  • Gravitational Fields Concept Checker
  • Orbital Motion Concept Checker
  • Balance Beam Concept Checker
  • Torque Balancer Concept Checker
  • Aluminum Can Polarization Concept Checker
  • Charging Concept Checker
  • Name That Charge Simulation
  • Coulomb's Law Concept Checker
  • Electric Field Lines Concept Checker
  • Put the Charge in the Goal Concept Checker
  • Circuit Builder Concept Checker (Series Circuits)
  • Circuit Builder Concept Checker (Parallel Circuits)
  • Circuit Builder Concept Checker (∆V-I-R)
  • Circuit Builder Concept Checker (Voltage Drop)
  • Equivalent Resistance Interactive
  • Pendulum Motion Simulation Concept Checker
  • Mass on a Spring Simulation Concept Checker
  • Particle Wave Simulation Concept Checker
  • Boundary Behavior Simulation Concept Checker
  • Slinky Wave Simulator Concept Checker
  • Simple Wave Simulator Concept Checker
  • Wave Addition Simulation Concept Checker
  • Standing Wave Maker Simulation Concept Checker
  • Color Addition Concept Checker
  • Painting With CMY Concept Checker
  • Stage Lighting Concept Checker
  • Filtering Away Concept Checker
  • InterferencePatterns Concept Checker
  • Young's Experiment Interactive
  • Plane Mirror Images Interactive
  • Who Can See Who Concept Checker
  • Optics Bench (Mirrors) Concept Checker
  • Name That Image (Mirrors) Interactive
  • Refraction Concept Checker
  • Total Internal Reflection Concept Checker
  • Optics Bench (Lenses) Concept Checker
  • Kinematics Preview
  • Velocity Time Graphs Preview
  • Moving Cart on an Inclined Plane Preview
  • Stopping Distance Preview
  • Cart, Bricks, and Bands Preview
  • Fan Cart Study Preview
  • Friction Preview
  • Coffee Filter Lab Preview
  • Friction, Speed, and Stopping Distance Preview
  • Up and Down Preview
  • Projectile Range Preview
  • Ballistics Preview
  • Juggling Preview
  • Marshmallow Launcher Preview
  • Air Bag Safety Preview
  • Colliding Carts Preview
  • Collisions Preview
  • Engineering Safer Helmets Preview
  • Push the Plow Preview
  • Its All Uphill Preview
  • Energy on an Incline Preview
  • Modeling Roller Coasters Preview
  • Hot Wheels Stopping Distance Preview
  • Ball Bat Collision Preview
  • Energy in Fields Preview
  • Weightlessness Training Preview
  • Roller Coaster Loops Preview
  • Universal Gravitation Preview
  • Keplers Laws Preview
  • Kepler's Third Law Preview
  • Charge Interactions Preview
  • Sticky Tape Experiments Preview
  • Wire Gauge Preview
  • Voltage, Current, and Resistance Preview
  • Light Bulb Resistance Preview
  • Series and Parallel Circuits Preview
  • Thermal Equilibrium Preview
  • Linear Expansion Preview
  • Heating Curves Preview
  • Electricity and Magnetism - Part 1 Preview
  • Electricity and Magnetism - Part 2 Preview
  • Vibrating Mass on a Spring Preview
  • Period of a Pendulum Preview
  • Wave Speed Preview
  • Slinky-Experiments Preview
  • Standing Waves in a Rope Preview
  • Sound as a Pressure Wave Preview
  • DeciBel Scale Preview
  • DeciBels, Phons, and Sones Preview
  • Sound of Music Preview
  • Shedding Light on Light Bulbs Preview
  • Models of Light Preview
  • Electromagnetic Radiation Preview
  • Electromagnetic Spectrum Preview
  • EM Wave Communication Preview
  • Digitized Data Preview
  • Light Intensity Preview
  • Concave Mirrors Preview
  • Object Image Relations Preview
  • Snells Law Preview
  • Reflection vs. Transmission Preview
  • Magnification Lab Preview
  • Reactivity Preview
  • Ions and the Periodic Table Preview
  • Periodic Trends Preview
  • Reaction Rates Preview
  • Ammonia Factory Preview
  • Gaining Teacher Access
  • Tasks and Classes
  • Tasks - Classic
  • Subscription
  • Subscription Locator
  • 1-D Kinematics
  • Newton's Laws
  • Vectors - Motion and Forces in Two Dimensions
  • Momentum and Its Conservation
  • Work and Energy
  • Circular Motion and Satellite Motion
  • Thermal Physics
  • Static Electricity
  • Electric Circuits
  • Vibrations and Waves
  • Sound Waves and Music
  • Light and Color
  • Reflection and Mirrors
  • About the Physics Interactives
  • Task Tracker
  • Usage Policy
  • Newtons Laws
  • Vectors and Projectiles
  • Forces in 2D
  • Momentum and Collisions
  • Circular and Satellite Motion
  • Balance and Rotation
  • Electromagnetism
  • Waves and Sound
  • Forces in Two Dimensions
  • Work, Energy, and Power
  • Circular Motion and Gravitation
  • Sound Waves
  • 1-Dimensional Kinematics
  • Circular, Satellite, and Rotational Motion
  • Einstein's Theory of Special Relativity
  • Waves, Sound and Light
  • QuickTime Movies
  • About the Concept Builders
  • Pricing For Schools
  • Directions for Version 2
  • Measurement and Units
  • Relationships and Graphs
  • Rotation and Balance
  • Vibrational Motion
  • Reflection and Refraction
  • Teacher Accounts
  • Task Tracker Directions
  • Kinematic Concepts
  • Kinematic Graphing
  • Wave Motion
  • Sound and Music
  • About CalcPad
  • 1D Kinematics
  • Vectors and Forces in 2D
  • Simple Harmonic Motion
  • Rotational Kinematics
  • Rotation and Torque
  • Rotational Dynamics
  • Electric Fields, Potential, and Capacitance
  • Transient RC Circuits
  • Light Waves
  • Units and Measurement
  • Stoichiometry
  • Molarity and Solutions
  • Thermal Chemistry
  • Acids and Bases
  • Kinetics and Equilibrium
  • Solution Equilibria
  • Oxidation-Reduction
  • Nuclear Chemistry
  • NGSS Alignments
  • 1D-Kinematics
  • Projectiles
  • Circular Motion
  • Magnetism and Electromagnetism
  • Graphing Practice
  • About the ACT
  • ACT Preparation
  • For Teachers
  • Other Resources
  • Newton's Laws of Motion
  • Work and Energy Packet
  • Static Electricity Review
  • Solutions Guide
  • Solutions Guide Digital Download
  • Motion in One Dimension
  • Work, Energy and Power
  • Frequently Asked Questions
  • Purchasing the Download
  • Purchasing the CD
  • Purchasing the Digital Download
  • About the NGSS Corner
  • NGSS Search
  • Force and Motion DCIs - High School
  • Energy DCIs - High School
  • Wave Applications DCIs - High School
  • Force and Motion PEs - High School
  • Energy PEs - High School
  • Wave Applications PEs - High School
  • Crosscutting Concepts
  • The Practices
  • Physics Topics
  • NGSS Corner: Activity List
  • NGSS Corner: Infographics
  • About the Toolkits
  • Position-Velocity-Acceleration
  • Position-Time Graphs
  • Velocity-Time Graphs
  • Newton's First Law
  • Newton's Second Law
  • Newton's Third Law
  • Terminal Velocity
  • Projectile Motion
  • Forces in 2 Dimensions
  • Impulse and Momentum Change
  • Momentum Conservation
  • Work-Energy Fundamentals
  • Work-Energy Relationship
  • Roller Coaster Physics
  • Satellite Motion
  • Electric Fields
  • Circuit Concepts
  • Series Circuits
  • Parallel Circuits
  • Describing-Waves
  • Wave Behavior Toolkit
  • Standing Wave Patterns
  • Resonating Air Columns
  • Wave Model of Light
  • Plane Mirrors
  • Curved Mirrors
  • Teacher Guide
  • Using Lab Notebooks
  • Current Electricity
  • Light Waves and Color
  • Reflection and Ray Model of Light
  • Refraction and Ray Model of Light
  • Classes (Legacy Version)
  • Teacher Resources
  • Subscriptions

sound travel the slowest in

  • Newton's Laws
  • Einstein's Theory of Special Relativity
  • About Concept Checkers
  • School Pricing
  • Newton's Laws of Motion
  • Newton's First Law
  • Newton's Third Law
  • The Speed of Sound
  • Pitch and Frequency
  • Intensity and the Decibel Scale
  • The Human Ear

sound travel the slowest in

Since the speed of a wave is defined as the distance that a point on a wave (such as a compression or a rarefaction) travels per unit of time, it is often expressed in units of meters/second (abbreviated m/s). In equation form, this is

The faster a sound wave travels, the more distance it will cover in the same period of time. If a sound wave were observed to travel a distance of 700 meters in 2 seconds, then the speed of the wave would be 350 m/s. A slower wave would cover less distance - perhaps 660 meters - in the same time period of 2 seconds and thus have a speed of 330 m/s. Faster waves cover more distance in the same period of time.

Factors Affecting Wave Speed

The speed of any wave depends upon the properties of the medium through which the wave is traveling. Typically there are two essential types of properties that affect wave speed - inertial properties and elastic properties. Elastic properties are those properties related to the tendency of a material to maintain its shape and not deform whenever a force or stress is applied to it. A material such as steel will experience a very small deformation of shape (and dimension) when a stress is applied to it. Steel is a rigid material with a high elasticity. On the other hand, a material such as a rubber band is highly flexible; when a force is applied to stretch the rubber band, it deforms or changes its shape readily. A small stress on the rubber band causes a large deformation. Steel is considered to be a stiff or rigid material, whereas a rubber band is considered a flexible material. At the particle level, a stiff or rigid material is characterized by atoms and/or molecules with strong attractions for each other. When a force is applied in an attempt to stretch or deform the material, its strong particle interactions prevent this deformation and help the material maintain its shape. Rigid materials such as steel are considered to have a high elasticity. (Elastic modulus is the technical term). The phase of matter has a tremendous impact upon the elastic properties of the medium. In general, solids have the strongest interactions between particles, followed by liquids and then gases. For this reason, longitudinal sound waves travel faster in solids than they do in liquids than they do in gases. Even though the inertial factor may favor gases, the elastic factor has a greater influence on the speed ( v ) of a wave, thus yielding this general pattern:

Inertial properties are those properties related to the material's tendency to be sluggish to changes in its state of motion. The density of a medium is an example of an inertial property . The greater the inertia (i.e., mass density) of individual particles of the medium, the less responsive they will be to the interactions between neighboring particles and the slower that the wave will be. As stated above, sound waves travel faster in solids than they do in liquids than they do in gases. However, within a single phase of matter, the inertial property of density tends to be the property that has a greatest impact upon the speed of sound. A sound wave will travel faster in a less dense material than a more dense material. Thus, a sound wave will travel nearly three times faster in Helium than it will in air. This is mostly due to the lower mass of Helium particles as compared to air particles.  

The Speed of Sound in Air

The speed of a sound wave in air depends upon the properties of the air, mostly the temperature, and to a lesser degree, the humidity. Humidity is the result of water vapor being present in air. Like any liquid, water has a tendency to evaporate. As it does, particles of gaseous water become mixed in the air. This additional matter will affect the mass density of the air (an inertial property). The temperature will affect the strength of the particle interactions (an elastic property). At normal atmospheric pressure, the temperature dependence of the speed of a sound wave through dry air is approximated by the following equation:

where T is the temperature of the air in degrees Celsius. Using this equation to determine the speed of a sound wave in air at a temperature of 20 degrees Celsius yields the following solution.

v = 331 m/s + (0.6 m/s/C)•(20 C)

v = 331 m/s + 12 m/s

v = 343 m/s

(The above equation relating the speed of a sound wave in air to the temperature provides reasonably accurate speed values for temperatures between 0 and 100 Celsius. The equation itself does not have any theoretical basis; it is simply the result of inspecting temperature-speed data for this temperature range. Other equations do exist that are based upon theoretical reasoning and provide accurate data for all temperatures. Nonetheless, the equation above will be sufficient for our use as introductory Physics students.)

Look It Up!

Using wave speed to determine distances.

At normal atmospheric pressure and a temperature of 20 degrees Celsius, a sound wave will travel at approximately 343 m/s; this is approximately equal to 750 miles/hour. While this speed may seem fast by human standards (the fastest humans can sprint at approximately 11 m/s and highway speeds are approximately 30 m/s), the speed of a sound wave is slow in comparison to the speed of a light wave. Light travels through air at a speed of approximately 300 000 000 m/s; this is nearly 900 000 times the speed of sound. For this reason, humans can observe a detectable time delay between the thunder and the lightning during a storm. The arrival of the light wave from the location of the lightning strike occurs in so little time that it is essentially negligible. Yet the arrival of the sound wave from the location of the lightning strike occurs much later. The time delay between the arrival of the light wave (lightning) and the arrival of the sound wave (thunder) allows a person to approximate his/her distance from the storm location. For instance if the thunder is heard 3 seconds after the lightning is seen, then sound (whose speed is approximated as 345 m/s) has traveled a distance of

If this value is converted to miles (divide by 1600 m/1 mi), then the storm is a distance of 0.65 miles away.

Another phenomenon related to the perception of time delays between two events is an echo . A person can often perceive a time delay between the production of a sound and the arrival of a reflection of that sound off a distant barrier. If you have ever made a holler within a canyon, perhaps you have heard an echo of your holler off a distant canyon wall. The time delay between the holler and the echo corresponds to the time for the holler to travel the round-trip distance to the canyon wall and back. A measurement of this time would allow a person to estimate the one-way distance to the canyon wall. For instance if an echo is heard 1.40 seconds after making the holler , then the distance to the canyon wall can be found as follows:

The canyon wall is 242 meters away. You might have noticed that the time of 0.70 seconds is used in the equation. Since the time delay corresponds to the time for the holler to travel the round-trip distance to the canyon wall and back, the one-way distance to the canyon wall corresponds to one-half the time delay.

While an echo is of relatively minimal importance to humans, echolocation is an essential trick of the trade for bats. Being a nocturnal creature, bats must use sound waves to navigate and hunt. They produce short bursts of ultrasonic sound waves that reflect off objects in their surroundings and return. Their detection of the time delay between the sending and receiving of the pulses allows a bat to approximate the distance to surrounding objects. Some bats, known as Doppler bats, are capable of detecting the speed and direction of any moving objects by monitoring the changes in frequency of the reflected pulses. These bats are utilizing the physics of the Doppler effect discussed in an earlier unit (and also to be discussed later in Lesson 3 ). This method of echolocation enables a bat to navigate and to hunt.

The Wave Equation Revisited

Like any wave, a sound wave has a speed that is mathematically related to the frequency and the wavelength of the wave. As discussed in a previous unit , the mathematical relationship between speed, frequency and wavelength is given by the following equation.

Using the symbols v , λ , and f , the equation can be rewritten as

Check Your Understanding

1. An automatic focus camera is able to focus on objects by use of an ultrasonic sound wave. The camera sends out sound waves that reflect off distant objects and return to the camera. A sensor detects the time it takes for the waves to return and then determines the distance an object is from the camera. If a sound wave (speed = 340 m/s) returns to the camera 0.150 seconds after leaving the camera, how far away is the object?

Answer = 25.5 m

The speed of the sound wave is 340 m/s. The distance can be found using d = v • t resulting in an answer of 25.5 m. Use 0.075 seconds for the time since 0.150 seconds refers to the round-trip distance.

2. On a hot summer day, a pesky little mosquito produced its warning sound near your ear. The sound is produced by the beating of its wings at a rate of about 600 wing beats per second.

a. What is the frequency in Hertz of the sound wave? b. Assuming the sound wave moves with a velocity of 350 m/s, what is the wavelength of the wave?

Part a Answer: 600 Hz (given)

Part b Answer: 0.583 meters

3. Doubling the frequency of a wave source doubles the speed of the waves.

a. True b. False

Doubling the frequency will halve the wavelength; speed is unaffected by the alteration in the frequency. The speed of a wave depends upon the properties of the medium.

4. Playing middle C on the piano keyboard produces a sound with a frequency of 256 Hz. Assuming the speed of sound in air is 345 m/s, determine the wavelength of the sound corresponding to the note of middle C.

 Answer: 1.35 meters (rounded)

Let λ = wavelength. Use v = f • λ where v = 345 m/s and f = 256 Hz. Rearrange the equation to the form of λ = v / f. Substitute and solve.

5. Most people can detect frequencies as high as 20 000 Hz. Assuming the speed of sound in air is 345 m/s, determine the wavelength of the sound corresponding to this upper range of audible hearing.

Answer: 0.0173 meters (rounded)

Let λ = wavelength. Use v = f • λ where v = 345 m/s and f = 20 000 Hz. Rearrange the equation to the form of λ = v / f. Substitute and solve.

6. An elephant produces a 10 Hz sound wave. Assuming the speed of sound in air is 345 m/s, determine the wavelength of this infrasonic sound wave.

Answer: 34.5 meters

Let λ = wavelength. Use v = f • λ where v = 345 m/s and f = 10 Hz. Rearrange the equation to the form of λ = v / f. Substitute and solve.

7. Determine the speed of sound on a cold winter day (T=3 degrees C).

Answer: 332.8 m/s

The speed of sound in air is dependent upon the temperature of air. The dependence is expressed by the equation:

v = 331 m/s + (0.6 m/s/C) • T

where T is the temperature in Celsius. Substitute and solve.

v = 331 m/s + (0.6 m/s/C) • 3 C v = 331 m/s + 1.8 m/s v = 332.8 m/s

8. Miles Tugo is camping in Glacier National Park. In the midst of a glacier canyon, he makes a loud holler. He hears an echo 1.22 seconds later. The air temperature is 20 degrees C. How far away are the canyon walls?

Answer = 209 m

The speed of the sound wave at this temperature is 343 m/s (using the equation described in the Tutorial). The distance can be found using d = v • t resulting in an answer of 343 m. Use 0.61 second for the time since 1.22 seconds refers to the round-trip distance.

9. Two sound waves are traveling through a container of unknown gas. Wave A has a wavelength of 1.2 m. Wave B has a wavelength of 3.6 m. The velocity of wave B must be __________ the velocity of wave A.

a. one-ninth b. one-third c. the same as d. three times larger than

The speed of a wave does not depend upon its wavelength, but rather upon the properties of the medium. The medium has not changed, so neither has the speed.

10. Two sound waves are traveling through a container of unknown gas. Wave A has a wavelength of 1.2 m. Wave B has a wavelength of 3.6 m. The frequency of wave B must be __________ the frequency of wave A.

Since Wave B has three times the wavelength of Wave A, it must have one-third the frequency. Frequency and wavelength are inversely related.

  • Interference and Beats

Back Home

  • Science Notes Posts
  • Contact Science Notes
  • Todd Helmenstine Biography
  • Anne Helmenstine Biography
  • Free Printable Periodic Tables (PDF and PNG)
  • Periodic Table Wallpapers
  • Interactive Periodic Table
  • Periodic Table Posters
  • How to Grow Crystals
  • Chemistry Projects
  • Fire and Flames Projects
  • Holiday Science
  • Chemistry Problems With Answers
  • Physics Problems
  • Unit Conversion Example Problems
  • Chemistry Worksheets
  • Biology Worksheets
  • Periodic Table Worksheets
  • Physical Science Worksheets
  • Science Lab Worksheets
  • My Amazon Books

Speed of Sound in Physics

Speed of Sound

In physics, the speed of sound is the distance traveled per unit of time by a sound wave through a medium. It is highest for stiff solids and lowest for gases. There is no sound or speed of sound in a vacuum because sound (unlike light ) requires a medium in order to propogate.

What Is the Speed of Sound?

Usually, conversations about the speed of sound refer to the speed of sound of dry air (humidity changes the value). The value depends on temperature.

  • at 20 ° C or 68 ° F: 343 m/s or 1234.8 kph or 1125ft/s or 767 mph
  • at 0 ° C or 32 ° F: 331 m/s or 1191.6 kph or 1086 ft/s or 740 mph

Mach Numher

The Mach number is the ratio of air speed to the speed of sound. So, an object at Mach 1 is traveling at the speed of sound. Exceeding Mach 1 is breaking the sound barrier or is supersonic . At Mach 2, the object travels twice the speed of sound. Mach 3 is three times the speed of sound, and so on.

Remember that the speed of sound depends on temperature, so you break sound barrier at a lower speed when the temperature is colder. To put it another way, it gets colder as you get higher in the atmosphere, so an aircraft might break the sound barrier at a higher altitude even if it does not increase its speed.

Solids, Liquids, and Gases

The speed of sound is greatest for solids, intermediate for liquids, and lowest for gases:

v solid > v liquid >v gas

Particles in a gas undergo elastic collisions and the particles are widely separated. In contrast, particles in a solid are locked into place (rigid or stiff), so a vibration readily transmits through chemical bonds.

Here are examples of the difference between the speed of sound in different materials:

  • Diamond (solid): 12000 m/s
  • Copper (solid): 6420 m/s
  • Iron (solid): 5120 m/s
  • Water (liquid) 1481 m/s
  • Helium (gas): 965 m/s
  • Dry air (gas): 343 m/s

Sounds waves transfer energy to matter via a compression wave (in all phases) and also shear wave (in solids). The pressure disturbs a particle, which then impacts its neighbor, and continues traveling through the medium. The speed is how quickly the wave moves, while the frequency is the number of vibrations the particle makes per unit of time.

The Hot Chocolate Effect

The hot chocolate effect describes the phenomenon where the pitch you hear from tapping a cup of hot liquid rises after adding a soluble powder (like cocoa powder into hot water). Stirring in the powder introduces gas bubbles that reduce the speed of sound of the liquid and lower the frequency (pitch) of the waves. Once the bubbles clear, the speed of sound and the frequency increase again.

Speed of Sound Formulas

There are several formulas for calculating the speed of sound. Here are a few of the most common ones:

For gases these approximations work in most situations:

For this formula, use the Celsius temperature of the gas.

v = 331 m/s + (0.6 m/s/C)•T

Here is another common formula:

v = (γRT) 1/2

  • γ is the ratio of specific heat values or adiabatic index (1.4 for air at STP )
  • R is a gas constant (282 m 2 /s 2 /K for air)
  • T is the absolute temperature (Kelvin)

The Newton-Laplace formula works for both gases and liquids (fluids):

v = (K s /ρ) 1/2

  • K s is the coefficient of stiffness or bulk modulus of elasticity for gases
  • ρ is the density of the material

So solids, the situation is more complicated because shear waves play into the formula. There can be sound waves with different velocities, depending on the mode of deformation. The simplest formula is for one-dimensional solids, like a long rod of a material:

v = (E/ρ) 1/2

  • E is Young’s modulus

Note that the speed of sound decreases with density! It increases according to the stiffness of a medium. This is not intuitively obvious, since often a dense material is also stiff. But, consider that the speed of sound in a diamond is much faster than the speed in iron. Diamond is less dense than iron and also stiffer.

Factors That Affect the Speed of Sound

The primary factors affecting the speed of sound of a fluid (gas or liquid) are its temperature and its chemical composition. There is a weak dependence on frequency and atmospheric pressure that is omitted from the simplest equations.

While sound travels only as compression waves in a fluid, it also travels as shear waves in a solid. So, a solid’s stiffness, density, and compressibility also factor into the speed of sound.

Speed of Sound on Mars

Thanks to the Perseverance rover, scientists know the speed of sound on Mars. The Martian atmosphere is much colder than Earth’s, its thin atmosphere has a much lower pressure, and it consists mainly of carbon dioxide rather than nitrogen. As expected, the speed of sound on Mars is slower than on Earth. It travels at around 240 m/s or about 30% slower than on Earth.

What scientists did not expect is that the speed of sound varies for different frequencies. A high pitched sound, like from the rover’s laser, travels faster at around 250 m/s. So, for example, if you listened to a symphony recording from a distance on Mars you’d hear the various instruments at different times. The explanation has to do with the vibrational modes of carbon dioxide, the primary component of the Martian atmosphere. Also, it’s worth noting that the atmospheric pressure is so low that there really isn’t any much sound at all from a source more than a few meters away.

Speed of Sound Example Problems

Find the speed of sound on a cold day when the temperature is 2 ° C.

The simplest formula for finding the answer is the approximation:

v = 331 m/s + (0.6 m/s/C) • T

Since the given temperature is already in Celsius, just plug in the value:

v = 331 m/s + (0.6 m/s/C) • 2 C = 331 m/s + 1.2 m/s = 332.2 m/s

You’re hiking in a canyon, yell “hello”, and hear an echo after 1.22 seconds. The air temperature is 20 ° C. How far away is the canyon wall?

The first step is finding the speed of sound at the temperature:

v = 331 m/s + (0.6 m/s/C) • T v = 331 m/s + (0.6 m/s/C) • 20 C = 343 m/s (which you might have memorized as the usual speed of sound)

Next, find the distance using the formula:

d = v• T d = 343 m/s • 1.22 s = 418.46 m

But, this is the round-trip distance! The distance to the canyon wall is half of this or 209 meters.

If you double the frequency of sound, it double the speed of its waves. True or false?

This is (mostly) false. Doubling the frequency halves the wavelength, but the speed depends on the properties of the medium and not its frequency or wavelength. Frequency only affects the speed of sound for certain media (like the carbon dioxide atmosphere of Mars).

  • Everest, F. (2001). The Master Handbook of Acoustics . New York: McGraw-Hill. ISBN 978-0-07-136097-5.
  • Kinsler, L.E.; Frey, A.R.; Coppens, A.B.; Sanders, J.V. (2000). Fundamentals of Acoustics (4th ed.). New York: John Wiley & Sons. ISBN 0-471-84789-5.
  • Maurice, S.; et al. (2022). “In situ recording of Mars soundscape:. Nature. 605: 653-658. doi: 10.1038/s41586-022-04679-0
  • Wong, George S. K.; Zhu, Shi-ming (1995). “Speed of sound in seawater as a function of salinity, temperature, and pressure”. The Journal of the Acoustical Society of America . 97 (3): 1732. doi: 10.1121/1.413048

Related Posts

If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

To log in and use all the features of Khan Academy, please enable JavaScript in your browser.

Physics library

Course: physics library   >   unit 8.

  • Production of sound
  • Sound Properties: Amplitude, period, frequency, wavelength

Speed of Sound

  • Relative speed of sound in solids, liquids, and gases
  • Mach numbers
  • Decibel Scale
  • Why do sounds get softer?
  • Ultrasound medical imaging

Want to join the conversation?

  • Upvote Button navigates to signup page
  • Downvote Button navigates to signup page
  • Flag Button navigates to signup page

Good Answer

Video transcript

Speed of Sound

Sound is a pressure wave which travels through a medium. The speed at which it travels depends upon the medium. For example, with air, sound travels as each air particle hits its neighbor. The speed of sound, therefore, relates to the speed at which the pressure wave travels as each particle hits its neighbor. Because air is not particularly dense, sound travels relatively slowly as compared with water or the steel of train track rails.

Because sound is traveling through a medium, the properties of the medium may affect the speed at which sound travels. The most important factors are the internal properties and the elastic properties. Sound travels about three times faster in helium because the helium molecules are much lighter than air molecules and have less inertia and, therefore, react much faster to the sound pressure wave. Sound also travels much much faster in steel, because the steel is inelastic and, therefore, propagates the pressure wave much faster.

The speed of sound in air depends on several conditions:  temperature, pressure, humidity and CO 2 content. Pressure affects the mass density or inertia of air, while temperature affects the particle interaction or elastic property of air.

An approximate formula for the speed of sound through air in standard atmospheric conditions is:

Speed of Sound = 331.45 m/s + 0.6 m/s * Deg C

This corresponds to approximately 1100 feet per second, or 750 miles per hour.

Refraction of Sound Waves

As we can see from the formula above, the speed of sound differs noticeably with temperature. This has some very interesting effects where sound seems to "bend," both in air and in water. (This property is prevalent in light refraction .) Have you ever noticed that you don't hear the freeway as loudly across a lake during the day as you do at night? At night, the water temperature is warmer than the air, causing sounds to be forced downward, toward the surface, rather than dissipating.

This effect is essentially the same as what happens in a mirage. In that case, the light waves are bent upwards, reflecting the sky. When we see the reflection, we automatically assume it to be a reflection off of water.

Speed of Sound in Water

Because water is a much less elastic fluid than air, it transmits sound about four times faster or 1400 meters per second. It is interesting to note that sound travels at different speeds at different depths, the slowest being at about 3,000 feet below sea level. This difference is due to changing temperatures and pressures. As you go down, the water turns colder, making sounds travel slower. At some point, the temperature stabilizes, letting the pressure component take over, which slowly increases the speed of sound with increased depth.

This speed differential leads to an interesting focusing property of water. The change in speed of sound with depth creates a "focused" sound channel at this 3000 foot level, making it possible for sounds to travel around the world. Research has been done to locate downed airplanes or other events based on the location of the source of the noise. You can read more about this here .

You can calculate the speed of sound in water for a given temperature, salinity, and pressure here .

Distance to a Lightening Storm

You can approximate your distance from a lightning storm if you measure the time between when you see the flash and when you hear the thunder. Sound travels approximately 1/5 of a mile per second or 1 mile in 5 seconds. That converts to about 1/3 of a kilometer per second. So if you see the lightning 3 seconds before you hear it, the strike is approximately 0.6 miles, or 1 kilometer away.

Biographies

The Enlightened Mindset

Exploring the World of Knowledge and Understanding

Welcome to the world's first fully AI generated website!

What Does Sound Travel Slowest Through? A Comprehensive Guide

' src=

By Happy Sharer

sound travel the slowest in

Introduction

Sound is a type of energy created by vibrations that travel through a medium, such as air or water. It’s important to understand what mediums sound travels slowest through, because this affects the way we hear and experience sound. In this article, we will explore the different mediums in which sound travels slowest, and how various factors like temperature, pressure, density, and humidity can affect the speed of sound transmission.

Exploring the Different Mediums in Which Sound Travels Slowest

Exploring the Different Mediums in Which Sound Travels Slowest

Sound waves travel differently depending on the medium they are travelling through. Solids, liquids, and gases are all mediums for sound transmission. Of these three, sound travels slower in solids than in liquids or gases. This is because solids have more particles that can vibrate, making it harder for sound waves to pass through them.

The behavior of sound waves also varies depending on the type of material. For example, sound travels faster in dense materials, such as metal, than in less dense materials, such as air. The shape of the material also affects the speed of sound. A flat surface, such as a wall, will reflect sound waves, while a curved surface, such as a pipe, will absorb them.

Comparing the Speed of Sound Through Various Materials

Comparing the Speed of Sound Through Various Materials

The speed of sound in any given material depends on several factors, including temperature, pressure, and density. Air, water, glass, and steel are some of the most common materials through which sound waves travel. In general, sound travels faster in air than in water, glass, or steel. The speed of sound in air is approximately 343 meters per second at sea level and 15°C.

The speed of sound in water is much slower than in air, at about 1,500 meters per second. The speed of sound in glass is slower still, at about 5,000 meters per second. Steel has the slowest speed of sound of all, at about 5,900 meters per second.

Examining How Temperature and Pressure Affect Sound Velocity

Temperature and pressure both affect the speed of sound. As the temperature increases, the speed of sound increases. Likewise, as the pressure increases, the speed of sound increases. At sea level and 15°C, the speed of sound in air is 343 meters per second. At higher altitudes, where the air is thinner, the speed of sound decreases.

The speed of sound in water also changes with temperature and pressure. As the temperature increases, the speed of sound in water increases. Similarly, as the pressure increases, the speed of sound in water increases. The speed of sound in glass and steel is not significantly affected by temperature or pressure.

Analyzing the Impact of Density on the Rate of Sound Transmission

Analyzing the Impact of Density on the Rate of Sound Transmission

Density is another factor that affects the speed of sound. The denser the material, the faster the sound travels. For example, sound travels faster in steel than in air or water because steel is a denser material. Likewise, sound travels faster in water than in air because water is denser than air.

The relationship between sound velocity and density can be seen in the following equation: V = (K/ρ)^0.5, where V is the speed of sound, K is a constant, and ρ is the density of the material. This equation shows that as the density of a material increases, the speed of sound increases.

Investigating the Role of Humidity in Slowing Down Sound Waves

Humidity also affects the speed of sound. When the air is humid, the speed of sound decreases because the water molecules in the air act as a barrier to sound waves. The exact effect of humidity on sound velocity depends on the type of material the sound is travelling through. In general, sound travels slower in humid air than in dry air.

The effect of humidity on sound wave behavior can also be seen in other materials, such as water. When the water is humid, sound waves travel slower because the water molecules interfere with the transmission of sound waves. The same is true for other materials, such as glass and steel.

In conclusion, sound travels slowest through solids, followed by liquids and gases. The speed of sound depends on several factors, including temperature, pressure, density, and humidity. The speed of sound in air is approximately 343 meters per second at sea level and 15°C. The speed of sound in water is much slower than in air, at about 1,500 meters per second. The speed of sound in glass is slower still, at about 5,000 meters per second. Steel has the slowest speed of sound of all, at about 5,900 meters per second. Temperature, pressure, and humidity all affect the speed of sound in different materials. Finally, density plays an important role in determining the rate of sound transmission.

This article has provided an overview of what does sound travel slowest through. To gain a better understanding of sound wave behavior in various mediums, further research and experimentation is recommended. With an understanding of how sound waves travel in different mediums, we can better appreciate the beauty of sound and its many applications.

(Note: Is this article not meeting your expectations? Do you have knowledge or insights to share? Unlock new opportunities and expand your reach by joining our authors team. Click Registration to join us and share your expertise with our readers.)

Hi, I'm Happy Sharer and I love sharing interesting and useful knowledge with others. I have a passion for learning and enjoy explaining complex concepts in a simple way.

Related Post

Exploring japan: a comprehensive guide for your memorable journey, your ultimate guide to packing for a perfect trip to hawaii, the ultimate packing checklist: essentials for a week-long work trip, leave a reply cancel reply.

Your email address will not be published. Required fields are marked *

Expert Guide: Removing Gel Nail Polish at Home Safely

Trading crypto in bull and bear markets: a comprehensive examination of the differences, making croatia travel arrangements, make their day extra special: celebrate with a customized cake.

How The Speed of Sound Changes In Different Materials

The speed that sound travels largely depends on the material type.

For example, sound waves travel fastest when they are moving through solids and tend to travel a lot slower when moving through gases and liquids.

This is a very broad summary as it’s not only the type of material that makes a difference to the speed the sound is moving at; the density, elastic property and even the temperature can have an impact too.

So, how fast does sound travel through different materials? Let’s take a look!

The tables above display the speed of sound in liquid, gas and solid materials ranking from slowest to fastest.

As you can see, there is a huge difference in how fast speed travels depending on the material, from 343 m/s through air to 1,493 m/s through water up to 12,000 m/s through diamond.

So, why does sound travel at different speeds depending on the material?

What is sound?

accelerating soundwaves

First of all, we need to know what sound actually is to understand how it moves.

Sound is kinetic energy that is vibrating through molecules.

If the molecules are closer together then the sound can travel between them more easily and quickly.

If the molecules are further apart and less tightly bonded then it is harder for the sound to travel and as a result the sound travels slower.

This is why the speed of sound is faster in solids than in liquids and gases.

However, elastic properties and temperature also impact the speed that sound travels.

Key Factors That Impact the Speed of Sound

a noisy concert

The table clearly shows it is not just whether a material is solid or liquid that impacts the speed that sound can travel through it.

The following factors also have an effect:

·        Density

As we mentioned above, the density of an object impacts the speed that sound can travel through it.

It is because of this that sound can travel faster in gases that are denser. If we take a look at hydrogen as an example, it is denser than oxygen and therefore allows the sound to travel faster.

·        Elastic Properties

This basically refers to how a material holds its shape when force is applied, if the material has high elastic properties then it is able to easily return to its normal shape after pressure is applied.

Materials with higher elastic properties allow sound to travel through them more easily than materials with lower elastic properties.

It is more likely that materials with lower elastic properties will absorb the sound rather than carry it.

As an example, lead has high elastic properties compared to rubber and therefore allows the sound to travel much faster.

·        Temperature

Earlier we mentioned that temperature can also impact the speed of sound .

This depends on the material group as gases tend to behave a little differently when it comes to temperature.

We have mentioned that sound travels faster when molecules are closer together so surely that means colder gases allow sound to travel faster than warmer gases, right?

Although theoretically when gas is colder it brings molecules closer together which should make it easier and quicker for the sound to travel, a temperature increase causes increased vibrations and this movement of the molecules that occurs in hotter gases actually allows sound to travel more quickly.

Therefore, when the temperature is higher in gases sound is able to travel faster.

At -1 degree Celsius sound travels at 330.4 m/s, at 21 degree Celsius sound travels at 343.6 m/s and at 45 degrees Celsius sound travels at 358 m/s.

The sound has travelled faster through air because the increased temperature has increased the vibrations of the molecules.

Speed of Sound in Gases and Liquids

The speed of sound travelling through gases and liquids is considerably slower than the majority of solids we have listed.

That is due to the molecules being a lot less rigid in liquids and gases which causes a decrease in the elastic properties of those materials.

The molecules in liquids are further apart than in solids, and the molecules in gases are even further apart and this is why sound struggles to travel fast through these materials.

Using Material to Stop Sound

a noisy band playing live music

You may be reading this and thinking that sound doesn’t seem to travel that well through the walls and doors of your home anyway but this is because most of the time the sound waves have to first travel through the air and then through the solid material which means some of the sound will have already been lost before it even hits the door/ wall.

A proportion of the sound will most likely be reflected back into the room through the air too but when you think about the sound of someone knocking on a door – it travels very well through the solid material.

This is why it can be very effective to soundproof a kennel or a dog crate with material that doesn’t let sound travel well because the sound already needs to travel through the air (which is difficult) and then it will meet a material that it cannot travel through well and the sound will be absorbed rather than passed on.

Using Rubber for Sound-Absorbing / Proofing

As you can see in the table, sound travels at 60 m/s through rubber.

This was the lowest reading from the whole table and is the reason that rubber is considered to be one of the best soundproofing materials .

The rubber will absorb most of the sound rather than carrying it which means less of the sound will be transmitted past the rubber.

Whereas other material types won’t be as effective in reducing the sound as they allow the sound to travel easily and quickly.

Speed of Sound Summary

The speed of sound can vary greatly depending on the material it is travelling through.

This is why it is so important to know more about materials before choosing them for a certain task e.g. soundproofing or noise reduction.

The general properties of gases, liquids and solids help to determine the speed of sound but it is the specific density and elastic properties of the material in question which truly determine the sound the speed can travel.

This is why we see such variation in the table of solids.

As an Amazon Associate I may earn a small fee from qualifying purchases at no extra cost to you. This helps us run the site, so thanks for your support!

Leave a Comment Cancel reply

Save my name and email in my browser for the next time I comment.

Library homepage

  • school Campus Bookshelves
  • menu_book Bookshelves
  • perm_media Learning Objects
  • login Login
  • how_to_reg Request Instructor Account
  • hub Instructor Commons
  • Download Page (PDF)
  • Download Full Book (PDF)
  • Periodic Table
  • Physics Constants
  • Scientific Calculator
  • Reference & Cite
  • Tools expand_more
  • Readability

selected template will load here

This action is not available.

Physics LibreTexts

5.1.1: Speeds of Different Types of Waves

  • Last updated
  • Save as PDF
  • Page ID 26167

  • Kyle Forinash and Wolfgang Christian

The speed of a wave is fixed by the type of wave and the physical properties of the medium in which it travels. An exception is electromagnetic waves which can travel through a vacuum. For most substances the material will vibrate obeying a Hooke's law force as a wave passes through it and the speed will not depend on frequency. Electromagnetic waves in a vacuum and waves traveling though a linear medium are termed linear waves and have constant speed. Examples:

  • For sound waves in a fluid (for example air or water) the speed is determined by \(v=(B/\rho )^{1/2}\) where \(B\) is the bulk modulus or compressibility of the fluid in newtons per meter squared and \(\rho\) is the density in kilograms per cubic meter.
  • For sound waves in a solid the speed is determined by \(v= (Y/\rho )^{1/2}\) where \(Y\) is Young's modulus or stiffness in Newtons per meter squared and \(\rho\) is the density in kilograms per meter cubed.
  • For waves on a string the speed is determined by \(v=(T/\mu )^{1/2}\) where \(T\) is the tension in the string in Newtons and \(\mu\) is the mass per length in kilograms per meter.
  • Although electromagnetic waves do not need a medium to travel (they can travel through a vacuum) their speed in a vacuum, \(c = (1/\mu _{o} ε_{o})^{1/2} = 3.0\times 10^{8}\text{ m/s}\) is governed by two physical constants, the permeability \(\mu_{o}\) and the permittivity, \(ε_{o}\) of free space (vacuum).

Table \(\PageIndex{1}\)

Here is a more comprehensive list of the speed of sound in various materials .

As we saw in the previous chapter, there is a relationship between the period, wavelength and speed of the wave. The period of a cork floating in the water is affected by how fast the wave passes (wave speed) and the distance between peaks (wavelength). The relationship between speed, period and wavelength of a sine wave is given by \(v=\lambda /T\) where wavelength and period for a sine wave were defined previously. This can also be written as \(v=\lambda f\) since frequency is the inverse of period and is true for all linear waves. Notice that, since wave speed is normally a fixed quantity the frequency and wavelength will be inversely proportion; higher frequencies mean shorter wavelengths.

Often it is easier to write \(ω = 2πf\) where \(\omega\) is the angular frequency in radians per second instead of having to write \(2\pi f\) everywhere. Likewise it is easier to write \(k=2\pi /\lambda \) where \(k\) is the wave number in radians per meter rather than having to write \(2\pi /\lambda\) a lot. (Note that \(k\) is not a spring constant here.) Using these new definitions the speed of a wave can also be written as \(v=f\lambda =\omega /k\).

If the medium is uniform the speed of a wave is fixed and does not change. There are circumstances where the speed of a particular wave does change, however. Notice that the speed of sound in air depends on the density of the air (mass per volume). But the density of air changes with temperature and humidity. So the speed of sound can be different on different days and in different locations. The temperature dependence of the speed of sound in air is given by \(v = 344 + 0.6 (T - 20)\) in meters per second where \(T\) is the temperature in Celsius (\(T\) here is temperature, not period). Notice that at room temperature (\(20^{\circ}\text{C}\)) sound travels at \(344\text{ m/s}\).

The speed of sound can also be affected by the movement of the medium in which it travels. For example, wind can carry sound waves further (i.e. faster) if the sound is traveling in the same direction or it can slow the sound down if the sound is traveling in a direction opposite to the wind direction.

Electromagnetic waves travel at \(\text{c} = 3.0\times 10^{8}\text{ m/s}\) in a vacuum but slow down when they pass through a medium (for example light passing from air to glass). This occurs because the material has a different value for the permittivity and/or permeability due to the interaction of the wave with the atoms of the material. The amount the speed changes is given by the index of refraction \(n=c/v\) where \(c\) is the speed of light in a vacuum and \(v\) is the speed in the medium. The frequency of the wave does not change when it slows down so, since \(v=\lambda f\), the wavelength of electromagnetic waves in a medium must be slightly smaller.

Video/audio examples:

  • What is the speed of sound in a vacuum? Buzzer in a bell jar . Why is there no sound when the air is removed from the jar?
  • Demonstration of speed of sound in different gasses . Why is there no sound when the air is removed from the jar?
  • These two videos demonstrate the Allasonic effect. The speed of sound is different in a liquid with air bubbles because the density is different. As the bubbles burst, the speed of sound changes, causing the frequency of sound waves in the liquid column to change, thus changing the pitch. Example: one , two . What do you hear in each case?
  • The Zube Tube is a toy that has a spring inside attached to two plastic cups on either end. Vibrations in the spring travel at different speeds so a sound starting at one end (for example a click when you shake the tube and the spring hits the cup) ends up changing pitch at the other end as the various frequencies arrive. In other words this is a nonlinear system. See if you can figure out from the video which frequencies travel faster, high frequencies or low.

Mini-lab on measuring the speed of sound .

Questions on Wave Speed:

\(f=1/T,\quad v=f\lambda ,\quad v=\omega /k,\quad k=2\pi /\lambda,\quad \omega =2\pi f,\quad y(x,t)=A\cos (kx-\omega t+\phi ),\quad v=\sqrt{B/Q}\)

  • Light travels at \(3.0\times 10^{8}\text{ m/s}\) but sound waves travel at about \(344\text{ m/s}\). What is the time delay for light and sound to arrive from a source that is \(10,000\text{ m}\) away (this can be used to get an approximate distance to a thunderstorm)?
  • What two mistakes are made in science fiction movies where you see and hear an explosion in space at the same time?
  • Consult the table for the speed of sound in various substances. If you have one ear in the water and one ear out while swimming in a lake and a bell is rung that is half way in the water some distance away, which ear hears the sound first?
  • At \(20\text{C}\) the speed of sound is \(344\text{ m/s}\). How far does sound travel in \(1\text{ s}\)? How far does sound travel in \(60\text{ s}\)?
  • Compare the last two answers with the distance traveled by light which has a speed of \(3.0\times 10^{8}\text{ m/s}\). Why do you see something happen before you hear it?
  • The speed of sound in water is \(1482\text{ m/s}\). How far does sound travel under water in \(1\text{ s}\)? How far does sound travel under water in \(60\text{ s}\)?
  • What happens to the speed of sound in air as temperature increases?
  • Using the equation for the speed of sound at different temperatures, what is the speed of sound on a hot day when the temperature is \(30^{\circ}\text{C}\)? Hint: \(v = 344\text{ m/s} + 0.6 (T - 20)\) where \(T\) is the temperature in Celsius.
  • Using the speed of sound at \(30^{\circ}\text{C}\) from the last question, recalculate the distance traveled for the cases in question four.
  • Suppose on a cold day the temperature is \(-10^{\circ}\text{C}\: (14^{\circ}\text{F}\)). You are playing in the marching band outside. How long does it take the sound from the band to reach the spectators if they are \(100\text{ m}\) away?
  • What is the difference in the speed of sound in air on a hot day (\(40^{\circ}\text{C}\)) and a cold day (\(0^{\circ}\text{C}\))?
  • What would an orchestra sound like if different instruments produced sounds that traveled at different speeds?
  • The speed of a wave is fixed by the medium it travels in so, for a given situation, is usually constant. What happens to the frequency of a wave if the wavelength is doubled?
  • What happens to the wavelength of a wave if the frequency is doubled and has the same speed?
  • Suppose a sound wave has a frequency \(200\text{ Hz}\). If the speed of sound is \(343\text{ m/s}\), what wavelength is this wave?
  • What factors determine the speed of sound in air?
  • Why do sound waves travel faster through liquids than air?
  • Why do sound waves travel faster through solids than liquids?
  • The speed of sound in a fluid is given by \(v=\sqrt{B/Q}\) where \(B\) is the Bulk Modulus (compressibility) and \(Q\) is the density. What happens to the speed if the density of the fluid increases?
  • What must be true about the compressibility, \(B\), of water versus air, given that sound travels faster in water and water is denser than air?
  • The speed of sound in a fluid is given by \(v=\sqrt{B/Q}\) where \(B\) is the Bulk Modulus (compressibility) and \(Q\) is the density. Can you think of a clever way to measure the Bulk Modulus of a fluid if you had an easy way to measure the speed of sound in a fluid? Explain.
  • The speed of sound on a string is given by \(v=\sqrt{T/\mu}\) where \(T\) is the tension in Newtons and \(\mu\) is the linear density (thickness) in \(\text{kg/m}\). You also know that \(v=f\lambda\). Give two ways of changing the frequency of vibration of a guitar string based on the knowledge of these two equations.
  • For the previous question, increasing the tension does what to the frequency? What does using a denser string do to the frequency?
  • The following graph is of a wave, frozen in time at \(t = 0\). The equation describing the wave is \(y(x,t)=A\cos (kx-\omega t+\phi )\). Sketch the effect of doubling the amplitude, \(A\).

clipboard_e5f764e637575a65b45b9f0eb09115dd2.png

Figure \(\PageIndex{1}\)

  • For the following graph of a wave, sketch the effect of doubling the wavelength.

clipboard_e37815ebeb535ef7dffe9296d845d3d06.png

Figure \(\PageIndex{2}\)

  • The mathematical description of a sine wave is given by \(y(x,t)=A\cos (kx-\omega t+\phi )\). Explain what each of the terms \((A, k, \omega, \phi )\) represent.

PhysLink.com

Shop Our Online Science Store

Solar micro car kit diy stem kit.

  • $7.99 $4.95

Simple DC Motor DIY STEM Kit

Hand-crank generator diy stem kit.

  • $9.99 $5.95

Solar + Battery Car DIY STEM Kit

  • $11.99 $5.95

Doodling Shake Bot DIY STEM Kit

  • $8.99 $4.95

Flashing LED Circuit DIY Electronics Kit

  • $4.99 $2.59

3-in-1 Alternative Energy Car DIY STEM Kit

  • $19.99 $14.95

Battery-Powered Balancing Robot DIY STEM Kit

  • Privacy Policy
  • Cookie Policy

Which materials does sound travel the slowest?

User Avatar

SOUND TRAVELS FASTER IN STEEL, THAN IN AIR.

Sound is a longitudinal mechanical wave, whose velocity depends on the rigidity or the extent of intermolecular forces in the sample. More the rigidity, higher the speed. Solids have maximum rigidity, as opposed to gases.

Sound travels through gases the fastest because its particles are furthest apart. They travel the fastest through solids because the particles are closest together and the vibrations are able to travel the fastest.

add. sound waves travel slowest in lossy solids such as rubber (40 - 50 m/s), lead (1100 m/s).

Sound travels fastest in Beryllium (13 000 m/s).

Sound is a wave in materials. like ripples in a pond. the harder the material the faster the riples steel is hared then plastic hence the sound ripples travel faster.

To put it simply, because steel is harder then plastic. Sound travels faster and better through more dense objects because the sound waves can be carried along a denser substances more easily then a less dense one.

Speed of sound is directly related to "stiffness". Most plastics are less stiff than steel, so those plastics will have a lower speed of sound than steel.

Because steel is denser than plastic

Add your answer:

imp

Does Sound wave travel slowest through a hot materials or a cold materials?

Hot, because the molecules in the material are farther apart, at least in a gas

What does sound travel slowest in?

How well does sound travel through different materials.

It travels fastest through solids, slowest through gases, and liquids are in the middle.

Where does the sound travel slowest through?

What medium does sound travel the slowest in, why does a sound wave travel the slowest in a vacuum.

Sound waves don't just travel the slowest in a vacuum, they don't travel at all. The reason is that sound waves, like all mechanical waves, need a medium to travel through.

Through which one among the following materials does sound travel the slowest a air b glass c water d wood?

Does sound travel slower through air solids or liquids.

Sounds travels slowest in air and fastest in solids. Generally, sound travels faster through materials of higher densities.

Through what material does sound travel slowest?

sound will travel through air (gas), the slowest. Because the molecules in the air are farther apart. Actually rubber it will travel through rubber the slowest. Air is second slowest. Age: 15 Name: Rachel Thanks for reading! <3

Which one of the media does sound travel slowest through?

Do sound waves travel slowest through gases, through which material does sound travel slowest.

sound will travel through air (gas), the slowest. Because the molecule sin the air are farther apart. Actually rubber it will travel through rubber the slowest. Air is second slowest then water and then granite was all I learned . Also Saltwater is faster then water becaus e there more salt so air goes through it faster.

imp

Top Categories

Answers Logo

  • TN Navbharat
  • Times Drive
  • ET Now Swadesh

technology science

Why Does Sound Travel Faster In Solids? Explained

author-479263349

Updated Jan 8, 2024, 04:52 PM IST

Sound wave travel speed

The speed at which sound travels varies significantly depending on the material it moves through. (Image: Unsplash)

Virat Kohli Is A Must Former Indian Cricketer Reacts To Reports Of Kohli Being Dropped For T20 World Cup

'Virat Kohli Is A Must..', Former Indian Cricketer Reacts To Reports Of Kohli Being Dropped For T20 World Cup

World Sleep Day 2024 Home Remedies And Treatments To Manage Insomnia- Expert Shares

World Sleep Day 2024: Home Remedies And Treatments To Manage Insomnia- Expert Shares

Watch Musician Plays Sitar on iPad Netizens Incredibly Impressed

Watch: Musician Plays Sitar on iPad, Netizens ‘Incredibly Impressed'

K Kavithas Residence Raided By Enforcement Directorate In Delhi Liquor Scam

K Kavitha's Residence Raided By Enforcement Directorate In Delhi Liquor Scam

Nearly 80 DTC or Cluster Buses Break Down in Delhi Daily Police Data

Nearly 80 DTC or Cluster Buses Break Down in Delhi Daily: Police Data

Federer Reflects on Retirement Expresses Gratitude For Calling It Time Ahead of Tennis Titans Nadal Djokovic and Murray

Federer Reflects on Retirement: Expresses Gratitude For Calling It Time Ahead of Tennis Titans Nadal, Djokovic, and Murray

Microsofts Satya Nadella Surprised By Googles Lag In Global AI Race

Microsoft's Satya Nadella Surprised By Google's Lag In Global AI Race

Kolkata Testing on Dhano-Dhanye Setu to Affect Traffic For Few Hours on March 17 Check Advisory

Kolkata: Testing on Dhano-Dhanye Setu to Affect Traffic For Few Hours on March 17, Check Advisory

Microsofts Satya Nadella Surprised By Googles Lag In Global AI Race

Elon Musk Says SpaceX Starship Will Take Humanity To Mars But When Will It Happen

Microsoft Copilot Pro Now Available In India Check Subscription Price And Benefits

Microsoft Copilot Pro Now Available In India: Check Subscription Price And Benefits

Man Loses Rs 95 Lakh To Facebook Friend Scam All Details Here

Man Loses Rs 95 Lakh To Facebook Friend Scam, All Details Here

How Many Digits Of Pi When Dealing With Distance In Billions Answer Will Leave You Amazed

How Many Digits Of Pi When Dealing With Distance In Billions? Answer Will Leave You Amazed

2018 Primetime Emmy & James Beard Award Winner

R&K Insider

Join our newsletter to get exclusives on where our correspondents travel, what they eat, where they stay. Free to sign up.

A History of Moscow in 13 Dishes

Featured city guides.

CameraIcon

In which of the following media does sound travel slowest?

The correct option is a air the molecules in a solid medium are much closer together than those in a gas or a liquid. thus, solids allow sound waves to travel more quickly through them. the speed of sound is highest in solids and lowest in gases. ( s p e e d i n a i r ) < ( s p e e d i n s o u n d i n l i g h t ) < ( s p e e d i n s o u n d i n s o l i d ) hence, the correct answer is option (a)..

flag

Answer the following :

(i) Can sound travel in vacuum ?

(ii) How does the speed of sound differ in different media ?

thumbnail

Logo

Travel Itinerary For One Week in Moscow: The Best of Moscow!

I just got back from one week in Moscow. And, as you might have already guessed, it was a mind-boggling experience. It was not my first trip to the Russian capital. But I hardly ever got enough time to explore this sprawling city. Visiting places for business rarely leaves enough time for sightseeing. I think that if you’ve got one week in Russia, you can also consider splitting your time between its largest cities (i.e. Saint Petersburg ) to get the most out of your trip. Seven days will let you see the majority of the main sights and go beyond just scratching the surface. In this post, I’m going to share with you my idea of the perfect travel itinerary for one week in Moscow.

Moscow is perhaps both the business and cultural hub of Russia. There is a lot more to see here than just the Kremlin and Saint Basil’s Cathedral. Centuries-old churches with onion-shaped domes dotted around the city are in stark contrast with newly completed impressive skyscrapers of Moscow City dominating the skyline. I spent a lot of time thinking about my Moscow itinerary before I left. And this city lived up to all of my expectations.

7-day Moscow itinerary

Travel Itinerary For One Week in Moscow

Day 1 – red square and the kremlin.

Metro Station: Okhotny Ryad on Red Line.

No trip to Moscow would be complete without seeing its main attraction. The Red Square is just a stone’s throw away from several metro stations. It is home to some of the most impressive architectural masterpieces in the city. The first thing you’ll probably notice after entering it and passing vendors selling weird fur hats is the fairytale-like looking Saint Basil’s Cathedral. It was built to commemorate one of the major victories of Ivan the Terrible. I once spent 20 minutes gazing at it, trying to find the perfect angle to snap it. It was easier said than done because of the hordes of locals and tourists.

As you continue strolling around Red Square, there’s no way you can miss Gum. It was widely known as the main department store during the Soviet Era. Now this large (yet historic) shopping mall is filled with expensive boutiques, pricey eateries, etc. During my trip to Moscow, I was on a tight budget. So I only took a retro-style stroll in Gum to get a rare glimpse of a place where Soviet leaders used to grocery shop and buy their stuff. In case you want some modern shopping experience, head to the Okhotny Ryad Shopping Center with stores like New Yorker, Zara, and Adidas.

things to do in Moscow in one week

Read More: Was Socotra a Mistake?

To continue this Moscow itinerary, next you may want to go inside the Kremlin walls. This is the center of Russian political power and the president’s official residence. If you’re planning to pay Kremlin a visit do your best to visit Ivan the Great Bell Tower as well. Go there as early as possible to avoid crowds and get an incredible bird’s-eye view. There are a couple of museums that are available during designated visiting hours. Make sure to book your ticket online and avoid lines.

Day 2 – Cathedral of Christ the Saviour, the Tretyakov Gallery, and the Arbat Street

Metro Station: Kropotkinskaya on Red Line

As soon as you start creating a Moscow itinerary for your second day, you’ll discover that there are plenty of metro stations that are much closer to certain sites. Depending on your route, take a closer look at the metro map to pick the closest.

The white marble walls of Christ the Saviour Cathedral are awe-inspiring. As you approach this tallest Orthodox Christian church, you may notice the bronze sculptures, magnificent arches, and cupolas that were created to commemorate Russia’s victory against Napoleon.

travel itinerary for one week in Moscow

How to Get a Decent Haircut in a Foreign Country

Unfortunately, the current Cathedral is a replica, since original was blown to bits in 1931 by the Soviet government. The new cathedral basically follows the original design, but they have added some new elements such as marble high reliefs.

Home to some precious collection of artworks, in Tretyakov Gallery you can find more than 150,000 of works spanning centuries of artistic endeavor. Originally a privately owned gallery, it now has become one of the largest museums in Russia. The Gallery is often considered essential to visit. But I have encountered a lot of locals who have never been there.

Famous for its souvenirs, musicians, and theaters, Arbat street is among the few in Moscow that were turned into pedestrian zones. Arbat street is usually very busy with tourists and locals alike. My local friend once called it the oldest street in Moscow dating back to 1493. It is a kilometer long walking street filled with fancy gift shops, small cozy restaurants, lots of cute cafes, and street artists. It is closed to any vehicular traffic, so you can easily stroll it with kids.

Day 3 – Moscow River Boat Ride, Poklonnaya Hill Victory Park, the Moscow City

Metro Station: Kievskaya and Park Pobedy on Dark Blue Line / Vystavochnaya on Light Blue Line

Voyaging along the Moscow River is definitely one of the best ways to catch a glimpse of the city and see the attractions from a bit different perspective. Depending on your Moscow itinerary, travel budget and the time of the year, there are various types of boats available. In the summer there is no shortage of boats, and you’ll be spoiled for choice.

exploring Moscow

Travel Itinerary for One Week in Beijing

If you find yourself in Moscow during the winter months, I’d recommend going with Radisson boat cruise. These are often more expensive (yet comfy). They offer refreshments like tea, coffee, hot chocolate, and, of course, alcoholic drinks. Prices may vary but mostly depend on your food and drink selection. Find their main pier near the opulent Ukraine hotel . The hotel is one of the “Seven Sisters”, so if you’re into the charm of Stalinist architecture don’t miss a chance to stay there.

The area near Poklonnaya Hill has the closest relation to the country’s recent past. The memorial complex was completed in the mid-1990s to commemorate the Victory and WW2 casualties. Also known as the Great Patriotic War Museum, activities here include indoor attractions while the grounds around host an open-air museum with old tanks and other vehicles used on the battlefield.

How I Planned My Trip to Vietnam

The hallmark of the memorial complex and the first thing you see as you exit metro is the statue of Nike mounted to its column. This is a very impressive Obelisk with a statue of Saint George slaying the dragon at its base.

Maybe not as impressive as Shanghai’s Oriental Pearl Tower , the skyscrapers of the Moscow City (otherwise known as Moscow International Business Center) are so drastically different from dull Soviet architecture. With 239 meters and 60 floors, the Empire Tower is the seventh highest building in the business district.

The observation deck occupies 56 floor from where you have some panoramic views of the city. I loved the view in the direction of Moscow State University and Luzhniki stadium as well to the other side with residential quarters. The entrance fee is pricey, but if you’re want to get a bird’s eye view, the skyscraper is one of the best places for doing just that.

Day 4 – VDNKh, Worker and Collective Farm Woman Monument, The Ostankino TV Tower

Metro Station: VDNKh on Orange Line

VDNKh is one of my favorite attractions in Moscow. The weird abbreviation actually stands for Russian vystavka dostizheniy narodnogo khozyaystva (Exhibition of Achievements of the National Economy). With more than 200 buildings and 30 pavilions on the grounds, VDNKh serves as an open-air museum. You can easily spend a full day here since the park occupies a very large area.

Moscow sights

Places to Visit in Barcelona That Aren’t Beaches

First, there are pavilions that used to showcase different cultures the USSR was made of. Additionally, there is a number of shopping pavilions, as well as Moskvarium (an Oceanarium) that features a variety of marine species. VDNKh is a popular venue for events and fairs. There is always something going on, so I’d recommend checking their website if you want to see some particular exhibition.

A stone’s throw away from VDNKh there is a very distinctive 25-meters high monument. Originally built in 1937 for the world fair in Paris, the hulking figures of men and women holding a hammer and a sickle represent the Soviet idea of united workers and farmers. It doesn’t take much time to see the monument, but visiting it gives some idea of the Soviet Union’s grandiose aspirations.

I have a thing for tall buildings. So to continue my travel itinerary for one week in Moscow I decided to climb the fourth highest TV tower in the world. This iconic 540m tower is a fixture of the skyline. You can see it virtually from everywhere in Moscow, and this is where you can get the best panoramic views (yep, even better than Empire skyscraper).

top things to do in Moscow

Parts of the floor are made of tempered glass, so it can be quite scary to exit the elevator. But trust me, as you start observing buildings and cars below, you won’t want to leave. There is only a limited number of tickets per day, so you may want to book online. Insider tip: the first tour is cheaper, you can save up to $10 if go there early.

Day 5 – A Tour To Moscow Manor Houses

Metro Station: Kolomenskoye, Tsaritsyno on Dark Green Line / Kuskovo on Purple Line

I love visiting the manor houses and palaces in Moscow. These opulent buildings were generally built to house Russian aristocratic families and monarchs. Houses tend to be rather grand affairs with impressive architecture. And, depending on the whims of the owners, some form of a landscaped garden.

During the early part of the 20th century though, many of Russia’s aristocratic families (including the family of the last emperor) ended up being killed or moving abroad . Their manor houses were nationalized. Some time later (after the fall of the USSR) these were open to the public. It means that today a great many of Moscow’s finest manor houses and palaces are open for touring.

one week Moscow itinerary

20 Travel Tips I’ve Learned From Travelling The World

There are 20 manor houses scattered throughout the city and more than 25 in the area around. But not all of them easily accessible and exploring them often takes a lot of time. I’d recommend focusing on three most popular estates in Moscow that are some 30-minute metro ride away from Kremlin.

Sandwiched between the Moscow River and the Andropov Avenue, Kolomenskoye is a UNESCO site that became a public park in the 1920’s. Once a former royal estate, now it is one of the most tranquil parks in the city with gorgeous views. The Ascension Church, The White Column, and the grounds are a truly grand place to visit.

You could easily spend a full day here, exploring a traditional Russian village (that is, in fact, a market), picnicking by the river, enjoying the Eastern Orthodox church architecture, hiking the grounds as well as and wandering the park and gardens with wildflower meadows, apple orchards, and birch and maple groves. The estate museum showcases Russian nature at its finest year-round.

12 Stunning National Parks and Regional Parks In France

If my travel itinerary for one week in Moscow was a family tree, Tsaritsyno Park would probably be the crazy uncle that no-one talks about. It’s a large park in the south of the city of mind-boggling proportions, unbelievable in so many ways, and yet most travelers have never heard of it.

The palace was supposed to be a summer home for Empress Catherine the Great. But since the construction didn’t meet with her approval the palace was abandoned. Since the early 1990’s the palace, the pond, and the grounds have been undergoing renovations. The entire complex is now looking brighter and more elaborately decorated than at possibly any other time during its history. Like most parks in Moscow, you can visit Tsaritsyno free of charge, but there is a small fee if you want to visit the palace.

Moscow itinerary

How To Stop Procrastinating When Trip Planning

Last, but by no means least on my Moscow itinerary is Kuskovo Park . This is definitely an off-the-beaten-path place. While it is not easily accessible, you will be rewarded with a lack of crowds. This 18th-century summer country house of the Sheremetev family was one of the first summer country estates of the Russian nobility. And when you visit you’ll quickly realize why locals love this park.

Like many other estates, Kuskovo has just been renovated. So there are lovely French formal garden, a grotto, and the Dutch house to explore. Make sure to plan your itinerary well because the estate is some way from a metro station.

Day 6 – Explore the Golden Ring

Creating the Moscow itinerary may keep you busy for days with the seemingly endless amount of things to do. Visiting the so-called Golden Ring is like stepping back in time. Golden Ring is a “theme route” devised by promotion-minded journalist and writer Yuri Bychkov.

Having started in Moscow the route will take you through a number of historical cities. It now includes Suzdal, Vladimir, Kostroma, Yaroslavl and Sergiev Posad. All these awe-inspiring towns have their own smaller kremlins and feature dramatic churches with onion-shaped domes, tranquil residential areas, and other architectural landmarks.

Two Weeks In Thailand: The Perfect 14-Day Itinerary

I only visited two out of eight cities included on the route. It is a no-brainer that Sergiev Posad is the nearest and the easiest city to see on a day trip from Moscow. That being said, you can explore its main attractions in just one day. Located some 70 km north-east of the Russian capital, this tiny and overlooked town is home to Trinity Lavra of St. Sergius, UNESCO Site.

things to do in Moscow in seven days

You Will Also Like: 3-Day London Itinerary

Sergiev Posad is often described as being at the heart of Russian spiritual life. So it is uncommon to see the crowds of Russian pilgrims showing a deep reverence for their religion. If you’re traveling independently and using public transport, you can reach Sergiev Posad by bus (departs from VDNKh) or by suburban commuter train from Yaroslavskaya Railway Station (Bahnhof). It takes about one and a half hours to reach the town.

Trinity Lavra of St. Sergius is a great place to get a glimpse of filling and warming Russian lunch, specifically at the “ Gostevaya Izba ” restaurant. Try the duck breast, hearty potato and vegetables, and the awesome Napoleon cake.

Day 7 – Gorky Park, Izmailovo Kremlin, Patriarch’s Ponds

Metro Station: Park Kultury or Oktyabrskaya on Circle Line / Partizanskaya on Dark Blue Line / Pushkinskaya on Dark Green Line

Gorky Park is in the heart of Moscow. It offers many different types of outdoor activities, such as dancing, cycling, skateboarding, walking, jogging, and anything else you can do in a park. Named after Maxim Gorky, this sprawling and lovely park is where locals go on a picnic, relax and enjoy free yoga classes. It’s a popular place to bike around, and there is a Muzeon Art Park not far from here. A dynamic location with a younger vibe. There is also a pier, so you can take a cruise along the river too.

Random Russian guy

How to Save Money While Traveling in Europe

The Kremlin in Izmailovo is by no means like the one you can find near the Red Square. Originally built for decorative purposes, it now features the Vernissage flea market and a number of frequent fairs, exhibitions, and conferences. Every weekend, there’s a giant flea market in Izmailovo, where dozens of stalls sell Soviet propaganda crap, Russian nesting dolls, vinyl records, jewelry and just about any object you can imagine. Go early in the morning if you want to beat the crowds.

All the Bulgakov’s fans should pay a visit to Patriarch’s Ponds (yup, that is plural). With a lovely small city park and the only one (!) pond in the middle, the location is where the opening scene of Bulgakov’s novel Master and Margarita was set. The novel is centered around a visit by Devil to the atheistic Soviet Union is considered by many critics to be one of the best novels of the 20th century. I spent great two hours strolling the nearby streets and having lunch in the hipster cafe.

Conclusion and Recommendations

To conclude, Moscow is a safe city to visit. I have never had a problem with getting around and most locals are really friendly once they know you’re a foreigner. Moscow has undergone some serious reconstruction over the last few years. So you can expect some places to be completely different. I hope my one week Moscow itinerary was helpful! If you have less time, say 4 days or 5 days, I would cut out day 6 and day 7. You could save the Golden Ring for a separate trip entirely as there’s lots to see!

What are your thoughts on this one week Moscow itinerary? Are you excited about your first time in the city? Let me know in the comments below!

JOIN MY FREE WEEKLY NEWSLETTER!

Email Address *

YOU WILL ALSO LIKE

Russian Cuisine

10 Dishes You Must Try When Going To Moscow

train trips from moscow

15 Fantastic and Easy Day Trips Close to Moscow

weather in russia in may in celsius

When Is the Best Time To Visit Russia

24 comments.

sound travel the slowest in

Ann Snook-Moreau

Moscow looks so beautiful and historic! Thanks for including public transit information for those of us who don’t like to rent cars.

sound travel the slowest in

MindTheTravel

Yup, that is me 🙂 Rarely rent + stick to the metro = Full wallet!

sound travel the slowest in

Mariella Blago

Looks like you had loads of fun! Well done. Also great value post for travel lovers.

Thanks, Mariella!

sound travel the slowest in

I have always wanted to go to Russia, especially Moscow. These sights look absolutely beautiful to see and there is so much history there!

Agree! Moscow is a thousand-year-old city and there is definitely something for everyone.

sound travel the slowest in

Tara Pittman

Those are amazing buildings. Looks like a place that would be amazing to visit.

sound travel the slowest in

Adriana Lopez

Never been to Moscow or Russia but my family has. Many great spots and a lot of culture. Your itinerary sounds fantastic and covers a lot despite it is only a short period of time.

What was their favourite thing about Russia?

sound travel the slowest in

Gladys Parker

I know very little about Moscow or Russia for the\at matter. I do know I would have to see the Red Square and all of its exquisite architectural masterpieces. Also the CATHEDRAL OF CHRIST THE SAVIOUR. Thanks for shedding some light on visiting Moscow.

Thanks for swinging by! The Red Square is a great starting point, but there way too many places and things to discover aside from it!

sound travel the slowest in

Ruthy @ Percolate Kitchen

You are making me so jealous!! I’ve always wanted to see Russia.

sound travel the slowest in

Moscow is in my bucket list, I don’t know when I can visit there, your post is really useful. As a culture rich place we need to spend at least week.

sound travel the slowest in

DANA GUTKOWSKI

Looks like you had a great trip! Thanks for all the great info! I’ve never been in to Russia, but this post makes me wanna go now!

sound travel the slowest in

Wow this is amazing! Moscow is on my bucket list – such an amazing place to visit I can imagine! I can’t wait to go there one day!

sound travel the slowest in

The building on the second picture looks familiar. I keep seeing that on TV.

sound travel the slowest in

Reesa Lewandowski

What beautiful moments! I always wish I had the personality to travel more like this!

sound travel the slowest in

Perfect itinerary for spending a week in Moscow! So many places to visit and it looks like you had a wonderful time. I would love to climb that tower. The views I am sure must have been amazing!

I was lucky enough to see the skyline of Moscow from this TV Tower and it is definitely mind-blowing.

sound travel the slowest in

Chelsea Pearl

Moscow is definitely up there on my travel bucket list. So much history and iconic architecture!

Thumbs up! 🙂

sound travel the slowest in

Blair Villanueva

OMG I dream to visit Moscow someday! Hope the visa processing would be okay (and become more affordable) so I could pursue my dream trip!

Yup, visa processing is the major downside! Agree! Time and the money consuming process…

Save my name, email, and website in this browser for the next time I comment.

sound travel the slowest in

  • Privacy Overview
  • Strictly Necessary Cookies

My website uses cookies so that I can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to my website and helping me to understand which sections of Mind The Travel you find most interesting and useful.

You can adjust all of your cookie settings by navigating the tabs on the left hand side.

Strictly Necessary Cookie should be enabled at all times so that I can save your preferences for cookie settings.

If you disable this cookie, I will not be able to save your preferences. This means that every time you visit my website you will need to enable or disable cookies again.

IMAGES

  1. What Does Sound Travel Slowest Through? A Comprehensive Guide

    sound travel the slowest in

  2. blissbydesignnj: What Do Sound Waves Travel Fastest Through

    sound travel the slowest in

  3. How Does Sound Travel

    sound travel the slowest in

  4. How Sound Travels

    sound travel the slowest in

  5. How Sound Waves Travel

    sound travel the slowest in

  6. How Does Sound Travel?

    sound travel the slowest in

COMMENTS

  1. Relative speed of sound in solids, liquids, and gases

    For instance, if you heat up the air that a sound wave is travelling through, the density of the air decreases. This explains why sound travels faster through hotter air compared to colder air. The speed of sound at 20 degrees Celsius is about 343 meters per second, but the speed of sound at zero degrees Celsius is only about 331 meters per second.

  2. How sound moves

    The speed of sound in a material is determined mainly by two properties- the stiffness of the material and the density of the material. Sound travels fastest through materials that are stiff and light. In general, sound travels fastest through solids, slower through liquids and slowest through gasses. (See the table on this page).

  3. How Sound Travels Through Solids, Liquids and Gases

    When it comes to the speed of sound, a solid object will allow the vibration to move much faster since it has the most densely packed molecules. It will also make the sound the loudest. After solids, liquids have the highest speed of sound. And then finally gas, that included our air since it is made up of gasses.

  4. Physics Tutorial: The Speed of Sound

    The speed of a sound wave refers to how fast a sound wave is passed from particle to particle through a medium. The speed of a sound wave in air depends upon the properties of the air - primarily the temperature. Sound travels faster in solids than it does in liquids; sound travels slowest in gases such as air. The speed of sound can be calculated as the distance-per-time ratio or as the ...

  5. 17.3: Speed of Sound

    Figure 17.3.1 :The mass of a fluid in a volume is equal to the density times the volume, m = ρV = ρAx. The mass flow rate is the time derivative of the mass. Now consider a sound wave moving through a parcel of air. A parcel of air is a small volume of air with imaginary boundaries (Figure 17.3.5 ).

  6. Speed of Sound in Physics

    Speed of Sound in Physics. This entry was posted on June 17, 2023 by Anne Helmenstine (updated on June 22, 2023) The speed of sound in dry air at room temperature is 343 m/s or 1125 ft/s. In physics, the speed of sound is the distance traveled per unit of time by a sound wave through a medium. It is highest for stiff solids and lowest for gases.

  7. Explanation, Speed of Sound in Different Media, FAQs

    Solution: We know that the speed of sound is given by the formula: v = λ ν. Substituting the values in the equation, we get. v = 0.35 m × 2000 Hz = 700 m/s. The time taken by the sound wave to travel a distance of 1.5 km can be calculated as follows: Time = Distance Travelled/ Velocity.

  8. Speed of Sound (video)

    In non-humid air at 20 degrees Celsius, the speed of sound is about 343 meters per second or 767 miles per hour. We can also watch the speed of sound of a repeating simple harmonic wave. The speed of the wave can again be determined by the speed of the compressed regions as they travel through the medium.

  9. How Does Sound Travel From One Medium To Another?

    You may recall from your high school science classes that of the three states of matter, i.e., solid, liquid and gas, sound waves travel the fastest through solids. The second best is liquid, meaning that sound travels the slowest through gases. What this means is that if you want sound to travel from one place to another, you should try to make it pass through a solid.

  10. Speed of Sound

    It is interesting to note that sound travels at different speeds at different depths, the slowest being at about 3,000 feet below sea level. This difference is due to changing temperatures and pressures. As you go down, the water turns colder, making sounds travel slower. ... Sound travels approximately 1/5 of a mile per second or 1 mile in 5 ...

  11. What Does Sound Travel Slowest Through? A Comprehensive Guide

    In conclusion, sound travels slowest through solids, followed by liquids and gases. The speed of sound depends on several factors, including temperature, pressure, density, and humidity. The speed of sound in air is approximately 343 meters per second at sea level and 15°C. The speed of sound in water is much slower than in air, at about 1,500 ...

  12. How The Speed of Sound Changes In Different Materials

    5,050 m/s. Aluminium. 6,320 m/s. Diamond. 12,000 m/s. The tables above display the speed of sound in liquid, gas and solid materials ranking from slowest to fastest. As you can see, there is a huge difference in how fast speed travels depending on the material, from 343 m/s through air to 1,493 m/s through water up to 12,000 m/s through diamond.

  13. 5.1.1: Speeds of Different Types of Waves

    5.1.1: Speeds of Different Types of Waves. The speed of a wave is fixed by the type of wave and the physical properties of the medium in which it travels. An exception is electromagnetic waves which can travel through a vacuum. For most substances the material will vibrate obeying a Hooke's law force as a wave passes through it and the speed ...

  14. PDF Acoustics: How does sound travel?

    Sound energy can only be perceived by our bodies when it strikes a physical object, like a bone or our skin, causing it to vibrate. This lab will help connect sound production (sources of sound) with sound perception (using our sense of hearing, sight, or touch). Sound travels through space in longitudinal waves.

  15. Why does sound travel faster in solids than in liquids, and faster in

    The distances in liquids are shorter than in gases, but longer than in solids. Liquids are more dense than gases, but less dense than solids, so sound travels 2nd fast in liquids. Gases are the slowest because they are the least dense: the molecules in gases are very far apart, compared with solids and liquids. Answered by: Jonathan Apple

  16. Which materials does sound travel the slowest?

    add. sound waves travel slowest in lossy solids such as rubber (40 - 50 m/s), lead (1100 m/s). Sound travels fastest in Beryllium (13 000 m/s). Sound is a wave in materials. like ripples in a pond ...

  17. Why Does Sound Travel Faster In Solids? Explained

    The understanding of why sound travels faster in solids finds application in various fields: 1. Medical imaging. In medical imaging, sound waves are employed in techniques like ultrasound. The high speed of sound in the human body's solid tissues allows for precise imaging, aiding in diagnostics and medical procedures. 2.

  18. In which medium does sound travel slowest?

    Gases. Sound travels more quickly through solids than through liquids and gases because the molecules of a solid are closer together and, therefore, can transmit the vibrations (energy) faster. Sound travels most slowly through gases because the molecules of a gas are farthest apart. Hence option D is correct. Suggest Corrections.

  19. Free Moscow Sound Effects Download

    Download a sound effect to use in your next project. Royalty-free sound effects. Russian Land Loop. SergeQuadrado. 0:24. Download. accordeon balalaika. 0:24. Busy Moscow Restaurant at Dinnertime: The Old Tower. ... travel. city. ambience. noise. atmosphere. Pixabay users get 15% off at PremiumBeat with code PIXABAY15.

  20. Walking Tour: Central Moscow from the Arbat to the Kremlin

    This tour of Moscow's center takes you from one of Moscow's oldest streets to its newest park through both real and fictional history, hitting the Kremlin, some illustrious shopping centers, architectural curiosities, and some of the city's finest snacks. Start on the Arbat, Moscow's mile-long pedestrianized shopping and eating artery ...

  21. Night Driveing Moscow City. 4K Relaxing drive over the Garden ...

    Night Driveing Moscow City. Relaxing drive over the Garden Ring and Kutuzovsky Ave on a car with ambience sound. Hope you wil enjoy this videoEverything in t...

  22. In which of the following media does sound travel slowest?

    The correct option is A Air. The molecules in a solid medium are much closer together than those in a gas or a liquid. Thus, solids allow sound waves to travel more quickly through them. The speed of sound is highest in solids and lowest in gases. (Speed in air) <(Speed in Sound in light) < (Speed in Sound in solid)

  23. Travel Itinerary For One Week in Moscow

    Day 6 - Explore the Golden Ring. Creating the Moscow itinerary may keep you busy for days with the seemingly endless amount of things to do. Visiting the so-called Golden Ring is like stepping back in time. Golden Ring is a "theme route" devised by promotion-minded journalist and writer Yuri Bychkov.