Question 1

If at a concert, a wind blows directly from the orchestra toward you, the speed of the sound you hear will be

Accepted Answer

A)  decreased. 
B)  increased. 
C)  neither decreased nor increased. 
A)  decreased. 
B)  increased. 
C)  neither decreased nor increased.

Question 2

A base fiddle is louder than a harp because of its

Accepted Answer

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

Question 3

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

Question 4

A wave barrier is produced when a wave source moves

Accepted Answer

A)  faster than the waves it produces. 
B)  nearly as fast as the waves it produces. 
C)  as fast as the waves it produces. 
A)  faster than the waves it produces. 
B)  nearly as fast as the waves it produces. 
C)  as fast as the waves it produces.

Question 5

You dip your finger repeatedly into water and make waves. If you dip your finger more frequently, the wavelength of the waves

Accepted Answer

A)  lengthens. 
B)  shortens. 
C)  stays the same. 
A)  lengthens. 
B)  shortens. 
C)  stays the same.

Question 6

Inhaling helium increases the pitch of your voice. The 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 7

Resonance can be looked at as forced vibration with the

Accepted Answer

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

Question 8

As a source of continuous sound approaches a constant speed, you will be aware of an apparent increasing of its

Accepted Answer

A)  loudness, frequency, and wavelength. 
B)  loudness and frequency. 
C)  loudness and wavelength. 
D)  frequency and wavelength. 
E)  None of the above choices are correct. 
A)  loudness, frequency, and wavelength. 
B)  loudness and frequency. 
C)  loudness and wavelength. 
D)  frequency and wavelength. 
E)  None of the above choices are correct.

Question 9

The frequencies of sound that carry farther in air are

Accepted Answer

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

Question 10

A floating leaf oscillates up and down two complete cycles each second as a water wave passes by. What is the wave's frequency?

Accepted Answer

A)  1 hertz 
B)  0.5 hertz 
C)  3 hertz 
D)  6 hertz 
E)  2 hertz 
A)  1 hertz 
B)  0.5 hertz 
C)  3 hertz 
D)  6 hertz 
E)  2 hertz

Question 11

A Doppler effect occurs when a source of sound moves

Accepted Answer

A)  towards you. 
B)  away from you. 
C)  either towards you or away from you. 
D)  in a circle around you. 
A)  towards you. 
B)  away from you. 
C)  either towards you or away from you. 
D)  in a circle around you.

Question 12

Some singers have been said to shatter a crystal chandelier shatter with their voice. This is a demonstration of

Accepted Answer

A)  resonance. 
B)  an echo. 
C)  sound refraction. 
D)  beats. 
E)  interference. 
A)  resonance. 
B)  an echo. 
C)  sound refraction. 
D)  beats. 
E)  interference.

Question 13

A child swings to and fro on a playground swing. If the child stands rather than sits, the time for a to-and-fro swing is

Accepted Answer

A)  unchanged. 
B)  lengthened. 
C)  shortened. 
A)  unchanged. 
B)  lengthened. 
C)  shortened.

Question 14

High pitched sound has a high

Accepted Answer

A)  number of partial tones. 
B)  speed. 
C)  frequency. 
D)  All of the above choices are correct. 
E)  None of the above choices are correct. 
A)  number of partial tones. 
B)  speed. 
C)  frequency. 
D)  All of the above choices are correct. 
E)  None of the above choices are correct.

Question 15

Sound travels faster in air if the air temperature is

Accepted Answer

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

Question 16

Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave received at 100 megahertz is

Accepted Answer

A)  300 m. 
B)  3.0 m. 
C)  30 m. 
D)  0.3 m. 
E)  none of these 
A)  300 m. 
B)  3.0 m. 
C)  30 m. 
D)  0.3 m. 
E)  none of these

Question 17

A bow wave is produced when a wave source moves

Accepted Answer

A)  faster than the waves it produces. 
B)  as fast as the waves it produces. 
C)  nearly as fast as the waves it produces. 
A)  faster than the waves it produces. 
B)  as fast as the waves it produces. 
C)  nearly as fast as the waves it produces.

Question 18

The period of the second hand on a clock is

Accepted Answer

A)  1/60 second. 
B)  1 second. 
C)  12 hours. 
D)  3600 seconds. 
E)  60 seconds. 
A)  1/60 second. 
B)  1 second. 
C)  12 hours. 
D)  3600 seconds. 
E)  60 seconds.

Question 19

Sound waves cannot travel in

Accepted Answer

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

Question 20

A Doppler effect occurs when a source of sound moves

Accepted Answer

A)  toward you. 
B)  at right angles to you. 
C)  both of these 
D)  none of these 
A)  toward you. 
B)  at right angles to you. 
C)  both of these 
D)  none of these

If at a concert, a wind blows directly from the orchestra toward you, the speed of the sound you hear will be

A base fiddle is louder than a harp because of its

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

A wave barrier is produced when a wave source moves

You dip your finger repeatedly into water and make waves. If you dip your finger more frequently, the wavelength of the waves

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

Resonance can be looked at as forced vibration with the

As a source of continuous sound approaches a constant speed, you will be aware of an apparent increasing of its

The frequencies of sound that carry farther in air are

A floating leaf oscillates up and down two complete cycles each second as a water wave passes by. What is the wave's frequency?

A Doppler effect occurs when a source of sound moves

Some singers have been said to shatter a crystal chandelier shatter with their voice. This is a demonstration of

A child swings to and fro on a playground swing. If the child stands rather than sits, the time for a to-and-fro swing is

High pitched sound has a high

Sound travels faster in air if the air temperature is

Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave received at 100 megahertz is

A bow wave is produced when a wave source moves

The period of the second hand on a clock is

Sound waves cannot travel in

A Doppler effect occurs when a source of sound moves

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Exam 12: Waves and Sound

If at a concert, a wind blows directly from the orchestra toward you, the speed of the sound you hear will be

A base fiddle is louder than a harp because of its

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

A wave barrier is produced when a wave source moves

You dip your finger repeatedly into water and make waves. If you dip your finger more frequently, the wavelength of the waves

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

Resonance can be looked at as forced vibration with the

As a source of continuous sound approaches a constant speed, you will be aware of an apparent increasing of its

The frequencies of sound that carry farther in air are

A floating leaf oscillates up and down two complete cycles each second as a water wave passes by. What is the wave's frequency?

A Doppler effect occurs when a source of sound moves

Some singers have been said to shatter a crystal chandelier shatter with their voice. This is a demonstration of

A child swings to and fro on a playground swing. If the child stands rather than sits, the time for a to-and-fro swing is

High pitched sound has a high

Sound travels faster in air if the air temperature is

Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave received at 100 megahertz is

A bow wave is produced when a wave source moves

The period of the second hand on a clock is

Sound waves cannot travel in

A Doppler effect occurs when a source of sound moves

About Science

Atoms

Equilibrium and Linear Motion

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Temperature, Heat, and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Light Waves

Properties of Light

Quantum Theory

The Atomic Nucleus and Radioactivity

Physics of Rotation and Equilibrium

Filters