Ch 6 Paragraph 1 Repeat

• Physics

Sound

Chapter 6 paragraph 1

The speed of sound

The speed of sound is a property.

See page 64 in your book!

Calculations with the speed of sound

s= v x t

v = velocity (speed) in m/s

t = time in seconds (s)

s = distance in meters (m)

v = s / t

t = s / v

Ann is swimming in a swimmingpool. Somebody jumps in the water and hits the floor. After 0,01 s Ann hears the sound. Calculate the distance to Ann at which the swimmer jumped into the pool

Pieter tries to listen in to what is being said in the other room. For that reason he puts his ear against the wall. The voice he tries to hear has to travel trough 5 metres of air and 0,4 meters of concrete. Calculate how long it takes for the
sound to reach his ear.

Ben is standing near a cliff. When he claps his hands it takes 4 seconds until he hears the echo of his clap. How far away is the cliff?

A train is 3 kilometers away from Kevin and Patrick. Patrick puts his ear against the steel train track while Kevin listens in the air. Calculate the time difference for Kevin and Patrick when they hear the train.

When Lightning strikes in the distance it takes 174,9 s until you hear it and 0,00002 s until you see it. Calculate the speed of light.