Exam
Name___________________________________
MULTIPLE CHOICE.
Choose the one alternative that best completes the statement or answers the question.
1)
Consider a light wave and a sound wave with the same wave length. Which has the higher
frequency?
A) sound
B) light
C) they have the same frequency
1)
2)
The sound intensity level 3.25m from a source is 58.9dB. If power drops by a factor of 0.0170, what
is the new intensity level (in dB)?
A) 44.1dB
B) 41.2dB
C) 47.0dB
D) 38.3dB
2)
3)
A 0.663 meter string is clamped at both ends. If the lowest standing frequency in the string is
326Hz, what is the wave speed?
A) 816m/s
B) 432m/s
C) 657m/s
D) 536m/s
3)
4)
The mach angle for a supersonic jet is 16.89
e
Assuming that the speed of sound is 343.0 m/s, how
fast is the jet moving?
A) 1181 m/s
B) 1098 m/s
C) 1063 m/s
D) 1134 m/s
4)
5)
The siren of an ambulance wails at 1662 Hz when the ambulance is stationary. What frequency will
you hear after this ambulance passes you while traveling at 33.60 m/s? The speed of sound under
the prevailing conditions is 343.0 m/s.
A) 1745 Hz
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 Fall '05
 wurthmeir
 Light, m/s, intensity level, lowest standing frequency

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