Question 1

The energy of sound in air eventually becomes

Accepted Answer

A) increased internal energy of the air. 
B) weaker and weaker until it disappears. 
C) cancelled by destructive interference. 
D) cancelled by both destructive and constructive interference. 
A) increased internal energy of the air. 
B) weaker and weaker until it disappears. 
C) cancelled by destructive interference. 
D) cancelled by both destructive and constructive interference.

Question 2

Inhaling helium increases the pitch of your voice.One reason for this 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 the wavelength is greater. 
A) slower in helium than in air. 
B) faster in helium than in air. 
C) the same speed in helium,but the wavelength is greater.

Question 3

The phenomenon of beats results from sound

Accepted Answer

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

Question 4

In which one of these media does sound travel the fastest?

Accepted Answer

A) water vapor 
B) water 
C) ice 
D) steam 
E) Sound travels the same speed in each of the above media. 
A) water vapor 
B) water 
C) ice 
D) steam 
E) Sound travels the same speed in each of the above media.

Question 5

The frequencies of sound that carry farther in air are

Accepted Answer

A) low. 
B) high. 
C) ultrasonic. 
A) low. 
B) high. 
C) ultrasonic.

Question 6

Longitudinal waves of different lengths are traveling though a long metal rod.Those that travel at the greatest speed are

Accepted Answer

A) the shortest. 
B) those of medium length. 
C) the longest. 
D) impossible to predict without knowing the type of metal. 
E) None of the above choices are correct. 
A) the shortest. 
B) those of medium length. 
C) the longest. 
D) impossible to predict without knowing the type of metal. 
E) None of the above choices are correct.

Question 7

Compressions and rarefactions normally travel in

Accepted Answer

A) the same direction in a wave. 
B) opposite directions in a wave. 
C) directions that are at right angles to the wave direction. 
A) the same direction in a wave. 
B) opposite directions in a wave. 
C) directions that are at right angles to the wave direction.

Question 8

Double the frequency of sound and you also double its

Accepted Answer

A) wavelength. 
B) speed. 
C) amplitude. 
D) all of these 
E) none of these 
A) wavelength. 
B) speed. 
C) amplitude. 
D) all of these 
E) none of these

Question 9

The speed of a sound wave in air depends on

Accepted Answer

A) its frequency. 
B) its wavelength. 
C) the air temperature. 
D) All of the above choices are correct. 
E) None of the above choices are correct. 
A) its frequency. 
B) its wavelength. 
C) the air temperature. 
D) All of the above choices are correct. 
E) None of the above choices are correct.

Question 10

Compressions and rarefactions are characteristic of

Accepted Answer

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

Question 11

In perceiving its environment,a dolphin makes use of

Accepted Answer

A) echoes. 
B) the Doppler effect. 
C) ultrasound. 
D) All of the above choices are correct. 
E) None of the above choices are correct. 
A) echoes. 
B) the Doppler effect. 
C) ultrasound. 
D) All of the above choices are correct. 
E) None of the above choices are correct.

Question 12

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) Actually all of these - depends on the hearing ability of the person. 
A) 10 hertz to 10,000 hertz. 
B) 20 hertz to 20,000 hertz. 
C) 40 hertz to 40,000 hertz. 
D) Actually all of these - depends on the hearing ability of the person.

Question 13

The object with the highest natural frequency is a

Accepted Answer

A) small bell. 
B) large bell. 
C) medium size bell. 
A) small bell. 
B) large bell. 
C) medium size bell.

Question 14

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 choices are correct. 
A) 1 m. 
B) 10 m. 
C) 100 m. 
D) 1000 m. 
E) None of the above choices are correct.

Question 15

Which doesn't belong to the same family?

Accepted Answer

A) infrasonic waves 
B) ultrasonic waves 
C) radio waves 
D) shock waves 
E) longitudinal waves 
A) infrasonic waves 
B) ultrasonic waves 
C) radio waves 
D) shock waves 
E) longitudinal waves

Question 16

Sound travels faster in air if the air temperature is

Accepted Answer

A) warm. 
B) cold. 
C) average. 
A) warm. 
B) cold. 
C) average.

Question 17

A sound source of high frequency emits a high

Accepted Answer

A) speed. 
B) amplitude. 
C) pitch. 
D) all of these 
E) none of these 
A) speed. 
B) amplitude. 
C) pitch. 
D) all of these 
E) none of these

Question 18

For AM radio,the A stands for

Accepted Answer

A) acceleration. 
B) authorized. 
C) amplitude. 
D) agony. 
E) almost. 
A) acceleration. 
B) authorized. 
C) amplitude. 
D) agony. 
E) almost.

Question 19

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 20

A sound wave is a

Accepted Answer

A) longitudinal wave. 
B) transverse wave. 
C) standing wave. 
D) shock wave. 
E) None of the above choices are correct. 
A) longitudinal wave. 
B) transverse wave. 
C) standing wave. 
D) shock wave. 
E) None of the above choices are correct.

Exam 20: Sound

The energy of sound in air eventually becomes

Inhaling helium increases the pitch of your voice.One reason for this is that sound travels

The phenomenon of beats results from sound

In which one of these media does sound travel the fastest?

The frequencies of sound that carry farther in air are

Longitudinal waves of different lengths are traveling though a long metal rod.Those that travel at the greatest speed are

Compressions and rarefactions normally travel in

Double the frequency of sound and you also double its

The speed of a sound wave in air depends on

Compressions and rarefactions are characteristic of

In perceiving its environment,a dolphin makes use of

The approximate range of human hearing is

The object with the highest natural frequency is a

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

Which doesn't belong to the same family?

Sound travels faster in air if the air temperature is

A sound source of high frequency emits a high

For AM radio,the A stands for

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

A sound wave is a

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