Question 1

The amplitude of a wave is the distance from the crest to the equilibrium position.

Accepted Answer

A) True 
 B)False

Question 2

A sound of 20 dB intensity is twice as loud as one of 10 dB.

Accepted Answer

A) True 
 B)False

Question 3

Piano tuners listen to the beat frequency between their tuning fork and the wire they are tuning.

Accepted Answer

A) True 
 B)False  True

Question 4

The restoring force of a spring is proportional to the displacement of the object at the end.

Accepted Answer

A) True 
 B)False

Question 5

If v =  λ\lambdaλ f, then how are  λ\lambdaλ  and f related?

Accepted Answer

A)   λ\lambdaλ  is directly proportional to f
B)   λ\lambdaλ  is inversely proportional to f
C)   λ\lambdaλ  is a factor of f
D)   λ\lambdaλ  and f are unrelated E) B) and D)
F) None of the above

Question 6

When you are moving toward a stationary source of a sound, its frequency will appear lower than it actually is.

Accepted Answer

A) True 
 B)False  False

Question 7

The time that is required for a vibrating object to complete one full cycle is called

Accepted Answer

A)  frequency.
B)  wavelength.
C)  amplitude.
D)  period.E) C) and D)
F) A) and B)

Question 8

Resonance occurs at a (an)

Accepted Answer

A)  natural frequency.
B)  intensity match.
C)  point of constructive interference.
D)  point of destructive interference.E) C) and D)
F) B) and C)

Question 9

Longitudinal waves with a frequency above 20,000 Hz are

Accepted Answer

A)  impossible.
B)  supersonic.
C)  ultrasonic.
D)  infrasonic.E) A) and C)
F) All of the above

Question 10

The fundamental frequency of a vibrating string has a length that is 1/2 the wavelength.

Accepted Answer

A) True 
 B)False  True

Question 11

The frequency is the time required for one complete cycle.

Accepted Answer

A) True 
 B)False

Question 12

You are able to hear sounds from farther away on a cool night because sound waves are refracted toward

Accepted Answer

A)  cooler air near the ground.
B)  warmer air above the ground.
C)  cooler air above the ground.
D)  warmer air near the ground.E) B) and C)
F) A) and D)

Question 13

Transverse mechanical waves can pass through

Accepted Answer

A)  solids.
B)  liquids.
C)  gases.
D)  All of the above.E) A) and B)
F) None of the above

Question 14

The lowest frequency possible in a vibrating string undergoing resonance is

Accepted Answer

A)  the fundamental frequency.
B)  determines the pitch of the musical note sounded.
C)  has one antinode.
D)  All of the above.E) All of the above
F) None of the above

Question 15

The bending of a wave at the boundary between two media is called

Accepted Answer

A)  reflection.
B)  resonance.
C)  reverberation.
D)  refraction.E) A) and B)
F) C) and D)

Question 16

Sound travels faster through cold, denser air than through warm, less dense air.

Accepted Answer

A) True 
 B)False

Question 17

A noise level of 65 decibels is measured for

Accepted Answer

A)  a whisper.
B)  a jet plane.
C)  normal conversation.
D)  a library.E) A) and B)
F) A) and C)

Question 18

Waves that move through air are transverse.

Accepted Answer

A) True 
 B)False

Question 19

Through which medium will sound travel most rapidly?

Accepted Answer

A)  vacuum
B)  air
C)  water
D)  steelE) A) and D)
F) All of the above

Question 20

Reflected sound waves that are heard within 0.1 s

Accepted Answer

A)  undergo a gain in volume.
B)  make an echo.
C)  cause interference.
D)  make a beat.E) A) and D)
F) A) and C)

Exam 5: Wave Motions and Sound

The amplitude of a wave is the distance from the crest to the equilibrium position.

Correct AnswerverifiedShow Answer

A sound of 20 dB intensity is twice as loud as one of 10 dB.

Correct AnswerverifiedShow Answer

Piano tuners listen to the beat frequency between their tuning fork and the wire they are tuning.

Correct AnswerverifiedTrue

The restoring force of a spring is proportional to the displacement of the object at the end.

Correct AnswerverifiedShow Answer

If v = λ\lambdaλ f, then how are λ\lambdaλ and f related?

Correct AnswerverifiedShow Answer

When you are moving toward a stationary source of a sound, its frequency will appear lower than it actually is.

Correct AnswerverifiedFalse

The time that is required for a vibrating object to complete one full cycle is called

Correct AnswerverifiedShow Answer

Resonance occurs at a (an)

Correct AnswerverifiedShow Answer

Longitudinal waves with a frequency above 20,000 Hz are

Correct AnswerverifiedShow Answer

The fundamental frequency of a vibrating string has a length that is 1/2 the wavelength.

Correct AnswerverifiedTrue

The frequency is the time required for one complete cycle.

Correct AnswerverifiedShow Answer

You are able to hear sounds from farther away on a cool night because sound waves are refracted toward

Correct AnswerverifiedShow Answer

Transverse mechanical waves can pass through

Correct AnswerverifiedShow Answer

The lowest frequency possible in a vibrating string undergoing resonance is

Correct AnswerverifiedShow Answer

The bending of a wave at the boundary between two media is called

Correct AnswerverifiedShow Answer

Sound travels faster through cold, denser air than through warm, less dense air.

Correct AnswerverifiedShow Answer

A noise level of 65 decibels is measured for

Correct AnswerverifiedShow Answer

Waves that move through air are transverse.

Correct AnswerverifiedShow Answer

Through which medium will sound travel most rapidly?

Correct AnswerverifiedShow Answer

Reflected sound waves that are heard within 0.1 s

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
True

Correct Answer
verified

If v = $\lambda$ f, then how are $\lambda$ and f related?

Correct Answer
verified

Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
True

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified