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9.2
Test Description: Applications of Waves and Vibrations
Instructions: Answer all questions to get your test result.
1) The general term used to describe what happens when two or more waves overlap in the same medium
A
acoustics
B
sine wave
C
interference
D
resonance
2) The study of sound wave technology
A
optics
B
DJ
C
acoustics
D
soundology
3) Which is not a way a technician can make a room sound less live?
A
put in hardwood floors
B
use foam
C
hang drapes
D
lay carpet
4) Where two waves of equal frequency overlap and are 180 degrees out of phase it is called
A
destructive interference
B
resonance
C
natural frequency
D
constructive interference
5) The amplitude is the height of the crest to the this
A
wavelength
B
trough
C
normal line
D
peak
6) A bridge can be destroyed if the wave vibrations match this.
A
constructive interference
B
natural frequency
C
destructive interference
D
amplitude
7) Each crest of a wave moves a horizontal distance of 50 cm in 5 seconds. What is the wave speed?
A
0.1 cm/sec
B
250 cm sec
C
10 cm/sec
D
250 cm/sec
8) This is the term applied to the increase in amplitude of vibration that occurs when an object is forced to vibrate at its natural frequency
A
natural frequency
B
resonance
C
amplitude
D
interference
9) The lowest points on a sine wave are called
A
trough
B
wavelength
C
crest
D
amplitude
10) The highest points on a sine wave are called
A
crest
B
amplitude
C
trough
D
wavelength
*select an answer for all questions
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