Question 1

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

Question 2

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.

Question 3

The compressions and rarefactions in a longitudinal wave travel in

Accepted Answer

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

Question 4

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 B

Question 5

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 C

Question 6

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.

Question 7

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.

Question 8

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.

Question 9

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

Question 10

The frequency of the second hand on a clock is

Accepted Answer

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

Question 11

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

Question 12

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

Question 13

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

Question 14

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

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

Question 16

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.

Question 17

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

Question 18

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

Question 19

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

Question 20

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

Exam 19: Vibrations and Waves

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The compressions and rarefactions in a longitudinal wave travel in

Correct AnswerverifiedShow Answer

A shock wave is

Correct AnswerverifiedB

A shock wave is produced when a wave source moves

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The frequency of the second hand on a clock is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of these is a transverse wave?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The distance traveled by a wave during a single period is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

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?

Correct AnswerverifiedShow Answer

The source of all waves is

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified