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Chapter 25 Review #2
Test Description: Try this second game after completing 25-1.
Instructions: Answer all questions to get your test result.
1) Some of a wave's energy is always being dissipated as heat. In time, this will reduce the wave\'s
A
frequency
B
amplitude
C
wavelength
D
speed
2) The amplitude of a particular wave is 2 m. The top-to-bottom distance of the disturbance is
A
2m
B
6m
C
8m
D
4m
3) If you double the frequency of a vibrating object, its period
A
doesn't change
B
doubles
C
halved
D
quartered
4) What happens when an airplane is flying faster than the speed of sound?
A
A shock wave is produced
B
There is no sonic boom
C
It becomes very quiet inside the plane
D
Nobody can hear the plane fly overhead
5) An observer on the ground hears a sonic boom that is created by an airplane flying at a speed
A
just below the speed of sound
B
equal to the speed of sound
C
greater than the speed of sound
D
none of the above
6) The Doppler effect occurs when a source of sound moves
A
towards you
B
away from you or towards you
C
none of the choices
D
away from you
7) Two waves arrive at the same place at the same time exactly in step with each other. Each wave has an amplitude of 2 m. The resulting wave has an amplitude of
A
4m
B
0m
C
2m
D
3m
8) The period of an ocean wave is 10 seconds. What is the wave’s frequency?
A
100 Hz
B
1/10 Hz
C
1 Hz
D
1/100 Hz
9) A weight suspended from a spring bobs up and back down again over a distance of 3m in 10 seconds. Its frequency is
A
3.0 Hz
B
0.10 Hz
C
10.0 Hz
D
None of the above
10) A skipper on a boat notices wave crests passing the anchor chain every 6 seconds. The skipper estimates the distance between crests at 30 m. What is the speed of the water waves?
A
5.0 m/s
B
6.0 m/s
C
not enough information
D
30.0 m/s
*select an answer for all questions
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