Question 1

If you quickly run away from the orchestra at a concert, the frequency of the sound you hear will be

Accepted Answer

A) decreased. 
B) increased. 
C) neither of these. 
A) decreased. 
B) increased. 
C) neither of these. A

Question 2

A shock wave is produced when a wave source moves

Accepted Answer

A) nearly as fast as the waves it produces. 
B) as fast as the waves it produces. 
C) faster than the waves it produces. 
D) none of the above 
A) nearly as fast as the waves it produces. 
B) as fast as the waves it produces. 
C) faster than the waves it produces. 
D) none of the above C

Question 3

A shock wave is

Accepted Answer

A) the opposite of a bow wave. 
B) usually composed of a pair of closely spaced cones. 
C) weak for aircraft that fly at less than the speed of sound. 
D) all of the above 
E) none of the above 
A) the opposite of a bow wave. 
B) usually composed of a pair of closely spaced cones. 
C) weak for aircraft that fly at less than the speed of sound. 
D) all of the above 
E) none of the above B

Question 4

A water wave passes by a floating leaf that is made to oscillate up and down two complete cycles each second, which means that the wave's frequency is

Accepted Answer

A) 0.5 Hz. 
B) 1 Hz. 
C) 2 Hz. 
D) 3 Hz. 
E) 6 Hz. 
A) 0.5 Hz. 
B) 1 Hz. 
C) 2 Hz. 
D) 3 Hz. 
E) 6 Hz.

Question 5

The source of all waves is

Accepted Answer

A) something that vibrates. 
B) energy. 
C) a force of some kind. 
D) all of the above 
E) none of the above 
A) something that vibrates. 
B) energy. 
C) a force of some kind. 
D) all of the above 
E) none of the above

Question 6

The number of nodes, including the end points, in a standing wave that is three wavelengths long is

Accepted Answer

A) 4. 
B) 5. 
C) 6. 
D) 7. 
E) none of the above 
A) 4. 
B) 5. 
C) 6. 
D) 7. 
E) none of the above

Question 7

The stride of a horse would be quicker if more mass in its legs were concentrated

Accepted Answer

A) in the upper part, nearer the horse's body. 
B) towards its feet. 
C) halfway up its legs. 
D) uniformly all along its legs. 
E) none of the above 
A) in the upper part, nearer the horse's body. 
B) towards its feet. 
C) halfway up its legs. 
D) uniformly all along its legs. 
E) none of the above

Question 8

Which of these is a transverse wave?

Accepted Answer

A) a Slinky shaken to and fro. 
B) a radio wave 
C) a sound wave 
D) all of the above 
E) none of the above 
A) a Slinky shaken to and fro. 
B) a radio wave 
C) a sound wave 
D) all of the above 
E) none of the above

Question 9

A wave travels an average distance of one meter in one second with a frequency of 1 hertz. Its amplitude is

Accepted Answer

A) less than 1 meter. 
B) 1 meter. 
C) more than 1 meter. 
D) need more information 
A) less than 1 meter. 
B) 1 meter. 
C) more than 1 meter. 
D) need more information

Question 10

The compressions and rarefactions in a longitudinal wave travel in

Accepted Answer

A) the same direction. 
B) opposite directions. 
C) a vacuum. 
A) the same direction. 
B) opposite directions. 
C) a vacuum.

Question 11

A wave oscillates up and down two complete cycles each second. If the wave travels an average distance of 6 meters in one second, its wavelength is

Accepted Answer

A) 0.5 m. 
B) 1 m. 
C) 2 m. 
D) 3 m. 
E) 6 m. 
A) 0.5 m. 
B) 1 m. 
C) 2 m. 
D) 3 m. 
E) 6 m.

Question 12

If a child swinging to and fro on a playground swing stands up, her time for a to-and-fro swing is

Accepted Answer

A) longer. 
B) shorter. 
C) unchanged. 
A) longer. 
B) shorter. 
C) unchanged.

Question 13

The frequency of the second hand on a clock is

Accepted Answer

A) 1 hertz. 
B) 1/60 hertz. 
C) 60 hertz. 
A) 1 hertz. 
B) 1/60 hertz. 
C) 60 hertz.

Question 14

A floating leaf oscillates up and down two complete cycles in one second as a 10-meter long water wave passes by. What is the wave's speed?

Accepted Answer

A) 2 m/s 
B) 10 m/s 
C) 20 m/s 
D) 40 m/s 
E) more than 40 m/s 
A) 2 m/s 
B) 10 m/s 
C) 20 m/s 
D) 40 m/s 
E) more than 40 m/s

Question 15

As a supersonic aircraft increases in speed, the angle of its V-shaped shock wave becomes

Accepted Answer

A) wider. 
B) narrower. 
C) both of these 
D) neither of these 
A) wider. 
B) narrower. 
C) both of these 
D) neither of these

Question 16

An object that completes 100 vibrations in 5 seconds has a period of

Accepted Answer

A) 0.5 second. 
B) 1 second. 
C) 2 seconds. 
D) none of the above 
A) 0.5 second. 
B) 1 second. 
C) 2 seconds. 
D) none of the above

Question 17

A weight suspended from a spring bobs up and down over a distance of 1 meter in two seconds. Its frequency is

Accepted Answer

A) 0.5 hertz. 
B) 1 hertz. 
C) 2 hertz. 
D) none of the above 
A) 0.5 hertz. 
B) 1 hertz. 
C) 2 hertz. 
D) none of the above

Question 18

An object that completes 10 vibrations in 20 seconds has a frequency of

Accepted Answer

A) 0.5 hertz. 
B) 2 hertz. 
C) 200 hertz. 
A) 0.5 hertz. 
B) 2 hertz. 
C) 200 hertz.

Question 19

The distance traveled by a wave during a single period is

Accepted Answer

A) one-half wavelength. 
B) one wavelength. 
C) two wavelengths. 
D) none of the above 
A) one-half wavelength. 
B) one wavelength. 
C) two wavelengths. 
D) none of the above

Question 20

An object that completes 20 vibrations in 10 seconds has a frequency of

Accepted Answer

A) 0.5 hertz. 
B) 1 hertz. 
C) 2 hertz. 
D) 200 hertz. 
A) 0.5 hertz. 
B) 1 hertz. 
C) 2 hertz. 
D) 200 hertz.

Exam 19: Vibrations and Waves

If you quickly run away from the orchestra at a concert, the frequency of the sound you hear will be

A shock wave is produced when a wave source moves

A shock wave is

A water wave passes by a floating leaf that is made to oscillate up and down two complete cycles each second, which means that the wave's frequency is

The source of all waves is

The number of nodes, including the end points, in a standing wave that is three wavelengths long is

The stride of a horse would be quicker if more mass in its legs were concentrated

Which of these is a transverse wave?

A wave travels an average distance of one meter in one second with a frequency of 1 hertz. Its amplitude is

The compressions and rarefactions in a longitudinal wave travel in

A wave oscillates up and down two complete cycles each second. If the wave travels an average distance of 6 meters in one second, its wavelength is

If a child swinging to and fro on a playground swing stands up, her time for a to-and-fro swing is

The frequency of the second hand on a clock is

A floating leaf oscillates up and down two complete cycles in one second as a 10-meter long water wave passes by. What is the wave's speed?

As a supersonic aircraft increases in speed, the angle of its V-shaped shock wave becomes

An object that completes 100 vibrations in 5 seconds has a period of

A weight suspended from a spring bobs up and down over a distance of 1 meter in two seconds. Its frequency is

An object that completes 10 vibrations in 20 seconds has a frequency of

The distance traveled by a wave during a single period is

An object that completes 20 vibrations in 10 seconds has a frequency of

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