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Question


The time period of a sound wave is 0.020 s. What is its frequency?


Options:
A .   50 Hz
B .   5 Hz
C .   20 Hz
D .   100 Hz
Answer: Option A
:
A
Given:
Time period of the wave, T=0.020 s
Frequency and time period are related as:
f=1T
f=10.020 s
f=50 Hz

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