Question 1

Approximately how many times faster is the speed of light in vacuum than the speed of sound in air?

Accepted Answer

The answer of Approximately how many times faster is the...

Question 2

Wave period is the reciprocal of

Accepted Answer

A)   amplitude.
B)   frequency.
C)   wave velocity.
D)   all of these.

Question 3

A train sounding its horn is moving toward an observer. The pitch of the horn's sound relative to its normal pitch is

Accepted Answer

A)   lower.
B)   sometimes higher and sometimes lower.
C)   higher.
D)   the same.

Question 4

If a sound level increases by 40 dB, the intensity increases by a factor of ______________.

Accepted Answer

A)   one hundred thousand
B)   ten thousand
C)   one thousand
D)   one million

Question 5

A Doppler red shift indicates

Accepted Answer

A)   a shift toward higher frequencies.
B)   a shift toward longer wavelengths.
C)   that a light source is approaching relative to the observer.
D)   none of these.

Question 6

Light waves travel fastest in

Accepted Answer

A)   water.
B)   glass.
C)   a vacuum.
D)   air.
E)   none of these; they travel at the same speed in all these media.

Question 7

The minimum sound intensity that can be detected by the human ear is called the ______________ of hearing.

Accepted Answer

The answer of The minimum sound intensity that can be...

Question 8

An increase of 20 dB increases the sound intensity by a factor of

Accepted Answer

A)   10.
B)   200.
C)   100.
D)   20.

Question 9

Standing waves can be set up in a string when two waves that are

Accepted Answer

A)   of the same frequency and amplitude, but are opposite in direction of travel, meet each other.
B)   of the same frequency, amplitude, and direction of travel are also 180° out of phase.
C)   of the same frequency, amplitude, and direction of travel meet each other.
D)   of the same frequency, amplitude, and velocity meet each other.

Exam 6: Waves and Sound

Light waves travel fastest in

Correct Answer
verified

A train sounding its horn is moving toward an observer. The pitch of the horn's sound relative to its normal pitch is

Correct Answer
verified

If a sound level increases by 40 dB, the intensity increases by a factor of ______________.

Correct Answer
verified

A Doppler red shift indicates

Correct Answer
verified

Standing waves can be set up in a string when two waves that are

Correct Answer
verified

Approximately how many times faster is the speed of light in vacuum than the speed of sound in air?

Correct Answer
verified

The minimum sound intensity that can be detected by the human ear is called the ______________ of hearing.

Correct Answer
verified

An increase of 20 dB increases the sound intensity by a factor of

Correct Answer
verified

Wave period is the reciprocal of

Correct Answer
verified

Exam 6: Waves and Sound

Light waves travel fastest in

Correct AnswerverifiedShow Answer

A train sounding its horn is moving toward an observer. The pitch of the horn's sound relative to its normal pitch is

Correct AnswerverifiedShow Answer

If a sound level increases by 40 dB, the intensity increases by a factor of ______________.

Correct AnswerverifiedShow Answer

A Doppler red shift indicates

Correct AnswerverifiedShow Answer

Standing waves can be set up in a string when two waves that are

Correct AnswerverifiedShow Answer

Approximately how many times faster is the speed of light in vacuum than the speed of sound in air?

Correct AnswerverifiedShow Answer

The minimum sound intensity that can be detected by the human ear is called the ______________ of hearing.

Correct AnswerverifiedShow Answer

An increase of 20 dB increases the sound intensity by a factor of

Correct AnswerverifiedShow Answer

Wave period is the reciprocal of

Correct AnswerverifiedShow Answer

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