Question 1

For FM radio,the F stands for

Accepted Answer

A) frequency. 
B) forced vibration at which resonance occurs. 
C) foul. 
D) female. 
E) fax. 
A) frequency. 
B) forced vibration at which resonance occurs. 
C) foul. 
D) female. 
E) fax. A

Question 2

Xenon has atomic number 54,while Krypton has atomic number 36.Given that both gases are at the same temperature,in which medium does sound travel faster?

Accepted Answer

A) Xenon gas 
B) Krypton gas 
C) a mixture of both gases 
D) the same in either gas 
A) Xenon gas 
B) Krypton gas 
C) a mixture of both gases 
D) the same in either gas B

Question 3

Refraction of sound can occur in

Accepted Answer

A) air. 
B) water. 
C) both air and water. 
D) neither air nor water. 
A) air. 
B) water. 
C) both air and water. 
D) neither air nor water. C

Question 4

A base fiddle is louder than a harp because of its

Accepted Answer

A) thicker strings. 
B) sounding board. 
C) lower pitch. 
D) All of the above are true. 
E) None of the above are true. 
A) thicker strings. 
B) sounding board. 
C) lower pitch. 
D) All of the above are true. 
E) None of the above are true.

Question 5

Sound waves cannot travel in

Accepted Answer

A) air. 
B) water. 
C) steel. 
D) a vacuum. 
E) any of the above media 
A) air. 
B) water. 
C) steel. 
D) a vacuum. 
E) any of the above media

Question 6

The wavelengths of sound that carry farther in air are relatively

Accepted Answer

A) long. 
B) short. 
C) ultrasonic. 
A) long. 
B) short. 
C) ultrasonic.

Question 7

The explanation for refraction must involve a change in

Accepted Answer

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

Question 8

On some days,air nearest the ground is colder than air that is higher up.On one of these days,sound waves

Accepted Answer

A) tend to be refracted upward. 
B) tend to be refracted downward. 
C) travel without refraction. 
A) tend to be refracted upward. 
B) tend to be refracted downward. 
C) travel without refraction.

Question 9

Use the following figure to answer the question:  
-When the handle of a tuning fork is held solidly against a table,the sound becomes louder and the time that the fork keeps vibrating

Accepted Answer

A) becomes longer. 
B) becomes shorter. 
C) remains the same. 
A) becomes longer. 
B) becomes shorter. 
C) remains the same.

Question 10

We are best at hearing

Accepted Answer

A) infrasonic sound. 
B) ultrasonic sound. 
C) both infrasonic and ultrasonic sounds. 
D) None of the above choices are true. 
A) infrasonic sound. 
B) ultrasonic sound. 
C) both infrasonic and ultrasonic sounds. 
D) None of the above choices are true.

Question 11

The least energy required to produce forced vibration in an object occurs

Accepted Answer

A) below its natural frequency. 
B) at its natural frequency. 
C) above its natural frequency. 
A) below its natural frequency. 
B) at its natural frequency. 
C) above its natural frequency.

Question 12

Sound will be louder if a struck tuning fork is held

Accepted Answer

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

Question 13

Reverberation is actually a case of

Accepted Answer

A) sound interference. 
B) forced vibrations. 
C) re-echoed sound. 
D) resonance. 
E) none of the above 
A) sound interference. 
B) forced vibrations. 
C) re-echoed sound. 
D) resonance. 
E) none of the above

Question 14

The source of every sound is something that is

Accepted Answer

A) vibrating. 
B) moving. 
C) accelerating. 
D) undergoing simple harmonic motion. 
E) a net emitter of energy. 
A) vibrating. 
B) moving. 
C) accelerating. 
D) undergoing simple harmonic motion. 
E) a net emitter of energy.

Question 15

A general rule for estimating the distance in kilometers between an observer and a lightning bolt is to count the number of seconds between seeing the lightning and hearing it,and dividing by

Accepted Answer

A) 2) 
B) 3) 
C) 4) 
D) 5) 
E) none of these 
A) 2) 
B) 3) 
C) 4) 
D) 5) 
E) none of these

Question 16

The beat frequency produced when a 240 hertz tuning fork and a 246 hertz tuning fork are sounded together is

Accepted Answer

A) 6 hertz. 
B) 12 hertz. 
C) 240 hertz. 
D) 245 hertz. 
E) None of the above choices are correct. 
A) 6 hertz. 
B) 12 hertz. 
C) 240 hertz. 
D) 245 hertz. 
E) None of the above choices are correct.

Question 17

Resonance can be looked at as forced vibration with the

Accepted Answer

A) least amount of energy input. 
B) maximum amount of energy input. 
C) matching of wave amplitudes. 
D) matching of constructive and destructive interference. 
E) minimum beat frequency. 
A) least amount of energy input. 
B) maximum amount of energy input. 
C) matching of wave amplitudes. 
D) matching of constructive and destructive interference. 
E) minimum beat frequency.

Question 18

Which type of radio wave produces the least static in a radio receiver?

Accepted Answer

A) AM 
B) FM 
C) Both have equal amounts of static. 
A) AM 
B) FM 
C) Both have equal amounts of static.

Question 19

Use the following figure to answer the question:  
-Repeatedly tap the side of a drinking glass with a spoon while filling it with water and you will notice that the pitch of the sound

Accepted Answer

A) increases. 
B) decreases. 
C) remains relatively constant. 
A) increases. 
B) decreases. 
C) remains relatively constant.

Question 20

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) not enough information to be certain 
B) 1056 hertz 
C) 1059 hertz 
D) 1053 hertz 
E) 3168 hertz 
A) not enough information to be certain 
B) 1056 hertz 
C) 1059 hertz 
D) 1053 hertz 
E) 3168 hertz

Exam 20: Sound

For FM radio,the F stands for

Xenon has atomic number 54,while Krypton has atomic number 36.Given that both gases are at the same temperature,in which medium does sound travel faster?

Refraction of sound can occur in

A base fiddle is louder than a harp because of its

Sound waves cannot travel in

The wavelengths of sound that carry farther in air are relatively

The explanation for refraction must involve a change in

On some days,air nearest the ground is colder than air that is higher up.On one of these days,sound waves

Use the following figure to answer the question: -When the handle of a tuning fork is held solidly against a table,the sound becomes louder and the time that the fork keeps vibrating

We are best at hearing

The least energy required to produce forced vibration in an object occurs

Sound will be louder if a struck tuning fork is held

Reverberation is actually a case of

The source of every sound is something that is

A general rule for estimating the distance in kilometers between an observer and a lightning bolt is to count the number of seconds between seeing the lightning and hearing it,and dividing by

The beat frequency produced when a 240 hertz tuning fork and a 246 hertz tuning fork are sounded together is

Resonance can be looked at as forced vibration with the

Which type of radio wave produces the least static in a radio receiver?

Use the following figure to answer the question: -Repeatedly tap the side of a drinking glass with a spoon while filling it with water and you will notice that the pitch of the sound

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?

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