If a wave completes 20 vibrations in 2.5 s, then its frequency is

1.	If a wave completes 20 vibrations in 2.5 s, then its frequency is
A.	20 Hz
B.	8 Hz
C.	200 Hz
D.	50 Hz
Answer» C. 200 Hz

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If a wave completes 20 vibrations in 2.5 s, then its frequency is

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