Unit 10 Concept Quiz - AP Physics B

If the frequency of a certain wave is 10 hertz, its period is

0.1 second

What is the period od a wave with a frequency of 1500 Hz?

0.67 ms

The amplitude of a particular wave is 1 meter. The top-to-bottom distance of the disturbance is

2 m

A floating leaf oscillates up and down two complete cycles in one second as a water wave passes by . The wave's wavelength is 10 meters. What is the wave's speed?

20 m/s

The wavelengths of the fundamental frequency of a vibrating string of length L is

2L

The speed of sound in air at normal temperatures is about ___ m/sec

340

What is the wave speed if a wave has a frequency of 12 Hz and a wavelength of 3.0 m

36 m/s

The lowest tone to resonate in an open pie of length L is 200 Hz. Which of the following frequencies will not resonate in the same pipe?

900 Hz

Which of the following types of interference will occur when the puises in the figure above meet? (the uneven one)

Constructive inerference

As a source of continuous sound appracohes a constant speed, you will be aware of an apparent increasing of its

None of the above choices are correct

An open pipe of length L is resonating at its fundamental frequency. Which statement is correct?

The wavelength is 2L and teher is a displacement node at the pipe's midpoint

Two waves traveling in opposite directions on a rope meet and undergo complete destructive interference. Which of the following best describes the waves a moment after the waves meet and coincide?

The waves continue unchanged

Sound waves cannot travel in

a vacuum

If you know the wavelength of any form of electromagnetic radiation, you can determind its frequency because

all wavelengths travel at the same speed

What determines "loudness" of a musical note?

amplitude

In a resonating pipe which iss open at both ends, there

are displacement antinodes at each end

Sound waves

are longitudinal waves

What is the formula to find speed of light?

c=yf

At a concert the oboe is playing a long steady note as you walk away from the stage at an accelerating velocity toward the restroom. The pitch of the sound that you hear is

continually decreasing

Due to the Doppler effect, the pitch of the siren of a fire truck moving away from you

decreases

Which of the following types of interference will occur when the pulses in the figure above meet? (the even one)

destructive interference

A Doppler effect occurs when a source of sound moves

either towards you or away from you

HIgh pitched sound has a high

frequency

Pitch depends on the ___ of a sound wave

frequency

A train moves down the track toward an observer. The sound from the train, as heard by the observer, is ____ the sound heard by the passenger on the train.

higher in pitch than

In a resonating pipe which is open at one end and closed at the other, there

is a displacement node at the closed end and a displacement antinode at the open end.

When sound passes from air into water

its frequency does not change.

Compressions and rarefractions are characteristic of

longitudinal waves

Double the frequency of sound and you also double is

none of these

When an air column vibrates in a pipe that is closed at one end,

only odd harmonics are present

A sound source of high frequency emits a high

pitch

The highness of lowness of a souns is percieved as

pitch

Part of a pencil that is placed in a glass of water appears bent in relation to the part of the pencil that extends out of the water. What is this phenomenon called?

refraction

The speed of a sound wave in air depends on

the air temperature

If you are on a train, how will the pitch of the train's whistle sound to you as the train moves?

the pitch will not change

When two mechanical wabes coincide, the amplitudeif the resultant wave us always ____ the amplitude of each wave alone.

the sum of

Large horns such as tubas produce sounds with long wavelengths while flutes produce sounds with short wavelengths because:

the wavelength of sound produced is directl proportional to the size of the instrument

The source of every sound is something that is

vibrating

A common source of wave motion is

vibrating object

Double the frequency of a sound and you halve its

wavelength