1 / 12

# The Speed of Sound - PowerPoint PPT Presentation

The Speed of Sound. How can you determine how far a thunder storm is away from you?. Speed of Sound. Much slower than the speed of light (values for air) Light – 300,000,000 m/s Sound – 332 m/s. Calculating Speed of Sound. Assuming no pressure change from atmospheric, V = 332 + 0.59T

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about 'The Speed of Sound' - lucine

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

### The Speed of Sound

Speed of Sound you?

• Much slower than the speed of light (values for air)

• Light – 300,000,000 m/s

• Sound – 332 m/s

• Assuming no pressure change from atmospheric,

V = 332 + 0.59T

• The speed of sound in air at 0C is 332m/s, the speed increases by 0.59m/s for every degree celsius raised

• What is the speed of sound in this room?

• Sound can travel through solid, liquid or gas

• Speed of sound depends on three things:

• Density of particles

• Closer particles are together – faster vibration can travel

• Gas – slow, solid – fast

• Sound travels faster on a humid day

• Temperature of Particles you?

• Faster the particles move, the quicker the vibration can be transferred

• Warm – Fast, Cold – slow

• Mass of the Particles

• Heavier the particles, the slower the vibration travels

Questions: you?

• Calculate the speed of sound if the temperature is: a) 1C b) 30C c) -10 C

• If the frequency of a radio wave is 102.1Mhz and the temperature of the air outside is 15C, what is the wavelength of the radio wave?

• A student is located 100m away from the school’s bell. If the bell rings, how long will it take the sound to reach the student’s ear if the temperature outside is -15 C?

• A swimmer is under the water while their friend is on the shore. If they are both the same distance away from a boat that is approaching, who will hear the boat first?

• Will sound travel faster at sea level or at the top of a mountain? The equator or the north pole? Explain.

• Echoes – sound that reflects off a barrier and returns to the source

• Only use the following formula for echoes:

v = 2d/t

V – speed of sound

d – distance from source to reflective barrier

t – time for sound to return

• Sonar you?

• Uses sound to detect things underwater

• Process called echolocation – by analyzing echoes (reflected sound) we can detect objects

• Echolocation you?

• Bats and dolphins use echolocation to find prey and locate things around themselves