Question 1

Sound will be louder if a struck tuning fork is held

Accepted Answer

A)  in the air.
B)  with its base against a tabletop.
C)  with its prongs in shallow water.
D)  in your closed fist.

Question 2

In perceiving its environment, a dolphin makes use of

Accepted Answer

A)  echoes.
B)  the Doppler effect.
C)  ultrasound.
D)  all of the above
E)  none of the above

Question 3

The approximate range of human hearing is

Accepted Answer

A)  10 hertz to 10,000 hertz.
B)  20 hertz to 20,000 hertz.
C)  40 hertz to 40,000 hertz.
D)  none of the above

Question 4

The natural frequency of an object depends on its

Accepted Answer

A)  size.
B)  shape.
C)  elasticity.
D)  all of the above
E)  none of the above

Question 5

The bell with the highest natural frequency is relatively

Accepted Answer

A)  small.
B)  large.
C)  either of these A

Question 6

A wave of frequency of 1000 hertz vibrates at

Accepted Answer

A)  less than 1000 cycles per second.
B)  1000 cycles per second.
C)  more than 1000 cycles per second.
D)  none of the above

Question 7

The explanation for refraction must involve a change in

Accepted Answer

A)  frequency.
B)  wavelength.
C)  speed.
D)  all of the above
E)  none of the above

Question 8

A sound wave is a

Accepted Answer

A)  longitudinal wave.
B)  transverse wave.
C)  all of the above
D)  none of the above A

Question 9

A tuning fork of frequency 200 hertz can resonate if an incident sound wave has a frequency of

Accepted Answer

A)  100 hertz.
B)  200 hertz.
C)  both of these
D)  neither of these

Question 10

Sound interference with a pair of radio loudspeakers can be nicely demonstrated when the

Accepted Answer

A)  radio signal is monaural for each.
B)  input and output of the speakers are reversed.
C)  speakers are brought face to face.
D)  all of the above
E)  none of the above

Question 11

In air and in water the same sound travels with different

Accepted Answer

A)  frequencies.
B)  speeds.
C)  both of these
D)  neither of these

Question 12

Wave interference occurs in

Accepted Answer

A)  transverse waves.
B)  longitudinal waves.
C)  both of the above
D)  none of the above

Question 13

When sound travels faster higher above the ground than below, bending of sound tends to be

Accepted Answer

A)  upward.
B)  downward.
C)  to the left.
D)  to the right.
E)  none of the above

Question 14

Interference is a property of

Accepted Answer

A)  water waves.
B)  sound waves.
C)  light waves.
D)  all of the above
E)  none of the above

Question 15

A 1056-hertz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. What is the frequency of the piano string?

Accepted Answer

A)  1056 hertz
B)  1059 hertz
C)  1053 hertz
D)  3168 hertz
E)  need more information

Question 16

The type of radio wave that produces the least static in a radio receiver is

Accepted Answer

A)  AM.
B)  FM.
C)  neither of these

Question 17

Human hearing is best in

Accepted Answer

A)  infrasonic sound.
B)  ultrasonic sound.
C)  both of these
D)  neither of these D

Question 18

A 340-hertz sound wave travels at 340 m/s in air with a wavelength of

Accepted Answer

A)  1 m.
B)  10 m.
C)  100 m.
D)  1000 m.
E)  none of the above

Question 19

A piano tuner knows that a key on the piano is tuned to the frequency of a test tuning fork when the fork and key struck at same time produce beats of

Accepted Answer

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

Question 20

An explosion occurs 34 km away. The time it takes for its sound to reach your ears, traveling at 340 m/s, is

Accepted Answer

A)  0.1 s.
B)  1 s.
C)  10 s.
D)  20 s.
E)  more than 20 s.

Exam 20: Sound

Sound will be louder if a struck tuning fork is held

Correct AnswerverifiedShow Answer

In perceiving its environment, a dolphin makes use of

Correct AnswerverifiedShow Answer

The approximate range of human hearing is

Correct AnswerverifiedShow Answer

The natural frequency of an object depends on its

Correct AnswerverifiedShow Answer

The bell with the highest natural frequency is relatively

Correct AnswerverifiedA

A wave of frequency of 1000 hertz vibrates at

Correct AnswerverifiedShow Answer

The explanation for refraction must involve a change in

Correct AnswerverifiedShow Answer

A sound wave is a

Correct AnswerverifiedA

A tuning fork of frequency 200 hertz can resonate if an incident sound wave has a frequency of

Correct AnswerverifiedShow Answer

Sound interference with a pair of radio loudspeakers can be nicely demonstrated when the

Correct AnswerverifiedShow Answer

In air and in water the same sound travels with different

Correct AnswerverifiedShow Answer

Wave interference occurs in

Correct AnswerverifiedShow Answer

When sound travels faster higher above the ground than below, bending of sound tends to be

Correct AnswerverifiedShow Answer

Interference is a property of

Correct AnswerverifiedShow Answer

A 1056-hertz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. What is the frequency of the piano string?

Correct AnswerverifiedShow Answer

The type of radio wave that produces the least static in a radio receiver is

Correct AnswerverifiedShow Answer

Human hearing is best in

Correct AnswerverifiedD

A 340-hertz sound wave travels at 340 m/s in air with a wavelength of

Correct AnswerverifiedShow Answer

A piano tuner knows that a key on the piano is tuned to the frequency of a test tuning fork when the fork and key struck at same time produce beats of

Correct AnswerverifiedShow Answer

An explosion occurs 34 km away. The time it takes for its sound to reach your ears, traveling at 340 m/s, is

Correct AnswerverifiedShow Answer

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A

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D

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