Question 1

Sound waves can interfere with one another so that no sound results.

Accepted Answer

A) True 
B) False 
C) Either, depending on the air temperature. 
A) True 
B) False 
C) Either, depending on the air temperature.

Question 2

One reason for the higher pitch of your voice after you've inhaled some helium is that sound travels

Accepted Answer

A) slower in helium than in air. 
B) faster in helium than in air. 
C) the same speed in helium but with a longer wavelength. 
A) slower in helium than in air. 
B) faster in helium than in air. 
C) the same speed in helium but with a longer wavelength.

Question 3

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

Accepted Answer

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

Question 4

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 5

When tuning a radio to a particular station, you match the frequency of the internal electrical circuit with the frequency of the wanted radio station. What principle is being employed?

Accepted Answer

A) forced vibrations 
B) resonance 
C) beats 
D) reverberation 
E) wave interference 
A) forced vibrations 
B) resonance 
C) beats 
D) reverberation 
E) wave interference

Question 6

Sound waves cannot travel in

Accepted Answer

A) air. 
B) water. 
C) steel. 
D) a vacuum. 
A) air. 
B) water. 
C) steel. 
D) a vacuum.

Question 7

Compressions and rarefactions are characteristics of

Accepted Answer

A) longitudinal waves. 
B) transverse waves. 
C) both of these 
D) need more information 
A) longitudinal waves. 
B) transverse waves. 
C) both of these 
D) need more information

Question 8

The speed of sound in air is greatest for

Accepted Answer

A) high frequencies. 
B) low frequencies. 
C) same for all frequencies. 
A) high frequencies. 
B) low frequencies. 
C) same for all frequencies.

Question 9

Sound travel fastest in

Accepted Answer

A) water vapor. 
B) water. 
C) ice. 
D) steam. 
E) all of the above 
A) water vapor. 
B) water. 
C) ice. 
D) steam. 
E) all of the above

Question 10

In choosing between sound waves and radio waves, which has the greater speed?

Accepted Answer

A) sound wave 
B) radio wave 
C) both the same 
D) need more information 
A) sound wave 
B) radio wave 
C) both the same 
D) need more information

Question 11

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 
E) none of the above 
A) thicker strings. 
B) sounding board. 
C) lower pitch. 
D) all of the above 
E) none of the above

Question 12

The speed of sound depends on

Accepted Answer

A) its frequency. 
B) its amplitude. 
C) the medium in which it travels. 
D) all of the above 
E) none of the above 
A) its frequency. 
B) its amplitude. 
C) the medium in which it travels. 
D) all of the above 
E) none of the above

Question 13

The phenomenon of beats is a result of sound

Accepted Answer

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

Question 14

Sound travels faster in air if the air temperature is

Accepted Answer

A) warm. 
B) cold. 
C) average. 
D) any of the above 
A) warm. 
B) cold. 
C) average. 
D) any of the above

Question 15

Assuming that xenon (atomic number 54)and krypton (atomic number 36)have the same temperature and pressure, in which gaseous medium does sound travel faster?

Accepted Answer

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

Question 16

Reverberation of sound occurs for

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 17

The speed of a sound wave in air depends on

Accepted Answer

A) its frequency. 
B) its wavelength. 
C) air temperature. 
D) all of the above 
E) none of the above 
A) its frequency. 
B) its wavelength. 
C) air temperature. 
D) all of the above 
E) none of the above

Question 18

The wavelengths of sound that carry farther in air are relatively

Accepted Answer

A) long. 
B) short. 
C) ultrasonic. 
D) none of the above 
A) long. 
B) short. 
C) ultrasonic. 
D) none of the above

Question 19

Compressions and rarefactions normally travel in

Accepted Answer

A) the same direction in a wave. 
B) opposite directions in a wave. 
C) right angles to the wave direction. 
D) none of the above 
A) the same direction in a wave. 
B) opposite directions in a wave. 
C) right angles to the wave direction. 
D) none of the above

Question 20

How long a tuning fork vibrates when its handle is held against a table is most related to

Accepted Answer

A) its frequency. 
B) resonance. 
C) the conservation of energy. 
D) the length of its prongs. 
A) its frequency. 
B) resonance. 
C) the conservation of energy. 
D) the length of its prongs.

Exam 20: Sound

Sound waves can interfere with one another so that no sound results.

One reason for the higher pitch of your voice after you've inhaled some helium is that sound travels

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

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

When tuning a radio to a particular station, you match the frequency of the internal electrical circuit with the frequency of the wanted radio station. What principle is being employed?

Sound waves cannot travel in

Compressions and rarefactions are characteristics of

The speed of sound in air is greatest for

Sound travel fastest in

In choosing between sound waves and radio waves, which has the greater speed?

A base fiddle is louder than a harp because of its

The speed of sound depends on

The phenomenon of beats is a result of sound

Sound travels faster in air if the air temperature is

Assuming that xenon (atomic number 54)and krypton (atomic number 36)have the same temperature and pressure, in which gaseous medium does sound travel faster?

Reverberation of sound occurs for

The speed of a sound wave in air depends on

The wavelengths of sound that carry farther in air are relatively

Compressions and rarefactions normally travel in

How long a tuning fork vibrates when its handle is held against a table is most related to

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