Physics Vibrations, Waves, and Sound

A weight on the end of a spring bobs up and down one complete cycle every 2 seconds (period). Its frequency is

.5 hertz

an explosion occurs 34 km away. given that sound travels at 340 m/s the time it takes for the sound to reach you is

100 secs 3400/340

A weight on the end of a spring bobs up and down one complete cycle every 2 seconds. Its period is

2 sec

A wave travels an average distance of 12 meters in 4 seconds. what is the waves velocity?

3 m/s

If you wished to produce a sound (speed=340 m/s ) with a wavelength in air equal to the length of the room, 5m, what would be its frequency

340/5= 68 hz

a wave has two up and two down cycles each second. If the wave travels an average distance of 6 meters in 1 second its wavelength is

3m Wavelength= velocity/frequency

two waves arrive at the same place at the same time exactly in phase with each other. Each wave has an amplitude of 2 m. the resulting wave has an amplitude of

4m

Beats are produced when two tuning forks, one of frequency 240 hz and the other of frequency 246 hz are sounded together. The frequency of the beats is

6 hz

the amplitude of a particulare wave is 4 meters. the top to bottom distance of the disturbance is

8m

What happens when an airplane is flying faster than the speed of sound?

A shock wave is produced

Some of a waves energy is always being dissipated as heat. in time this will reduces the waves

Amplitude

The period of an ocean wave is 10 seconds. What is the waves frequency

F=1/period 0.1 hz

When a pendulum clock is taken from sea level to the top of a high mountain it will

Gain time

If you triple the frequency of a vibrating object, its period

Is 1/3 what it was Period=1/frequency

A sound wave is a

Longitudinal wave

A skipper on a boat notices wave crests passing the anchor chain every 5 seconds. The skipper estimates the distance between crests at 15 m. What is the speed of the water waves?

S=distance/dtime 3 m/s

Which fo the following is not a transverse wave

Sound

A certain ocean wave has a frequency of .5 hertz and a wavelength of 20 meters. What is the waves speed?

V=Wavelength x F 10m/s

sound waves cannot travel in

a vacuum

Sound waves in air are a series of

all of the above

resonance occurs when

an object is forced vibrate at its natural frequency

A doppler effect occurs when a source of sound moves

both toward you and away from you

An observer on the ground hears a sonic boom which is created by a plane flying at a speed

greater than the speed of sound

unlike a transverse wave, a longitudinal wave has no

has all of the above amplitude, frequency, wavelength, and speed

when two or more waves are at the same place at the same time, the resulting effect is called

interference

A sonic boom

is swept continuously behind a plane flying faster than the speed of sound

sound travels faster in air if the air

is warm

When a sond source moves towards you, what happens to the wave speed

it stays the same

Suppose a bug is jiggling up and down and swimming away from you at the same time. compared to the frequency at which the bug is emitting waves, the frequency of the waves reaching you is

just the same

The source of all wave motion is a

movement of matter

standing waves can be set up

on all of the above on strings of musical instruments, in organ pipes, by blowing across the top of a soda bottle

During a single period the distance traveled by a wave is

one wavelenth

The time needs for a wave to make one complete cycles is its

period

the singer caruso is said to have made a crystal chandelier shatter with his voice . this is a demonstration of

resonance

Compare to the speed of light, sounds travels

slower

if the sounding board were left out of a music box, it would

sound softer than if it had a sounding board

Which of the following would be most likely to transmit sound the best (fastest)

steel in a bridge

An aircraft that flies faster than the speed of sound is said to be

supersonic

the speed of a sound wave depends on

the air temperature

a wave created by a shaking a string up and down is called a

transverse wave

hertz is a

unitz of frequency

Sound waves are produced by

vibrating objects

A cork floating in the ocean oscillates up and down two complete cycles in 1 second as an ocean wave passes by. the waves wavelent is 10 meters what is the waves speed?

wave speed= wavelength x frequency F= 1/period 10 x 2 = 20 m/s

the distance between successive identical parts of a wave is called its

wavelenth