Question 1

The explanation for refraction must involve a change in

Accepted Answer

A)   wavelength.
B)   speed.
C)   frequency.
D)   All of the above choices are true.
E)   None of the above choices are true.

Question 2

The phenomenon of beats results from sound

Accepted Answer

A)   reflection.
B)   interference.
C)   refraction.
D)   all of these
E)   none of these

Question 3

The pitch of a musical sound depends on the sound wave's

Accepted Answer

A)   frequency.
B)   amplitude.
C)   wavelength.
D)   speed.
E)   all of these

Question 4

Like a transverse wave, a longitudinal wave has

Accepted Answer

A)   amplitude, frequency, wavelength, and speed
B)   amplitude, wavelength, and speed.
C)   wavelength, speed, and frequency.
D)   amplitude, frequency, and wavelength.
E)   amplitude, frequency, and speed.

Question 5

Two tuning forks produce sounds of wavelengths 3.4 meters and 3.3 meters. Approximately what beat frequency is produced?

Accepted Answer

A)   3.0 hertz
B)   1.0 hertz
C)   0.1 hertz
D)   4.0 hertz
E)   2.0 hertz

Question 6

A fishing-boat captain returns to port saying, "It's rough out there - the waves are 4 meters high." He probably means that the amplitude of the waves is

Accepted Answer

A)   4 m.
B)   3 m.
C)   2 m.
D)   1 m.

Question 7

To say that one wave is out of phase with another is to say that the waves are

Accepted Answer

A)   of different wavelengths.
B)   out of step.
C)   of different amplitudes.
D)   of different frequencies.
E)   all of these

Question 8

A wave having a frequency of 1000 hertz vibrates at

Accepted Answer

A)   less than 1000 cycles per second.
B)   more than 1000 cycles per second.
C)   1000 cycles per second.

Question 9

The pendulum with the greatest frequency is the pendulum with the

Accepted Answer

A)   shortest amplitude.
B)   greatest amplitude.
C)   shortest period and the shortest length.
D)   shortest period.
E)   shortest length.

Question 10

An object that completes 20 vibrations in 10 seconds has a frequency of

Accepted Answer

A)   2 hertz.
B)   0.5 hertz.
C)   1 hertz.
D)   200 hertz.

Question 11

A piano tuner knows that a key on the piano is tuned to the frequency of his tuning fork when he strikes them at the same time and the number of beats he hears each second is

Accepted Answer

A)   0.
B)   1.
C)   2.
D)   3.
E)   4.

Question 12

In a longitudinal wave the compressions and rarefactions travel in

Accepted Answer

A)   opposite directions.
B)   the same direction.
C)   a vacuum.

Question 13

The loudness of a musical sound is a measure of the sound wave's

Accepted Answer

A)   wavelength.
B)   speed.
C)   frequency.
D)   amplitude.
E)   all of these

Question 14

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

Accepted Answer

A)   continually increasing.
B)   continually decreasing.
C)   steady but lower than normal.
D)   steady but higher than normal
E)   None of the above choices are correct.

Question 15

Compressions and rarefactions are characteristic of

Accepted Answer

A)   longitudinal waves.
B)   transverse waves.
C)   both longitudinal and transverse waves.
D)   Neither of the above choices are correct.

Question 16

The energy of sound in air eventually becomes

Accepted Answer

A)   weaker and weaker until it disappears.
B)   increased internal energy of the air.
C)   cancelled by destructive interference.
D)   cancelled by both destructive and constructive interference.

Question 17

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

Accepted Answer

A)   100 seconds.
B)   0.1 second.
C)   10 seconds.
D)   None of the above choices are correct.

Question 18

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?

Accepted Answer

A)   10 m/s
B)   20 m/s
C)   40 m/s
D)   2 m/s
E)   more than 40 m/s

Question 19

As a train of water waves goes by, a piece of cork floating on the water bobs up and down one complete cycle each second. The waves are 2 meters long. What is the speed of the wave?

Accepted Answer

A)   2 m/s
B)   4 m/s
C)   0.50 m/s
D)   0.25 m/s
E)   1.0 m/s

Question 20

The natural frequency of an object depends on its

Accepted Answer

A)   size, shape and elasticity.
B)   shape and elasticity.
C)   size and shape.
D)   size and elasticity.

Exam 12: Waves and Sound

In a longitudinal wave the compressions and rarefactions travel in

Correct AnswerverifiedShow Answer

A fishing-boat captain returns to port saying, "It's rough out there - the waves are 4 meters high." He probably means that the amplitude of the waves is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Compressions and rarefactions are characteristic of

Correct AnswerverifiedShow Answer

The pendulum with the greatest frequency is the pendulum with the

Correct AnswerverifiedShow Answer

The energy of sound in air eventually becomes

Correct AnswerverifiedShow Answer

The pitch of a musical sound depends on the sound wave's

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

To say that one wave is out of phase with another is to say that the waves are

Correct AnswerverifiedShow Answer

The phenomenon of beats results from sound

Correct AnswerverifiedShow Answer

The loudness of a musical sound is a measure of the sound wave's

Correct AnswerverifiedShow Answer

As a train of water waves goes by, a piece of cork floating on the water bobs up and down one complete cycle each second. The waves are 2 meters long. What is the speed of the wave?

Correct AnswerverifiedShow Answer

A piano tuner knows that a key on the piano is tuned to the frequency of his tuning fork when he strikes them at the same time and the number of beats he hears each second is

Correct AnswerverifiedShow Answer

The natural frequency of an object depends on its

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

An object that completes 20 vibrations in 10 seconds has a frequency of

Correct AnswerverifiedShow Answer

The explanation for refraction must involve a change in

Correct AnswerverifiedShow Answer

A wave having a frequency of 1000 hertz vibrates at

Correct AnswerverifiedShow Answer

Two tuning forks produce sounds of wavelengths 3.4 meters and 3.3 meters. Approximately what beat frequency is produced?

Correct AnswerverifiedShow Answer

Like a transverse wave, a longitudinal wave has

Correct AnswerverifiedShow Answer

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