A man clapping his hands at regular intervals observes that the echo of a clap...

JAMB 1986

A man clapping his hands at regular intervals observes that the echo of a clap coincides with the next clap. If the reflecting cliff is 160m away and the speed of sound is 320ms^-1, what is the frequency of the clapping?

A. 1 Hz
B. 2Hz
C. 4Hz
D. 8Hz

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Correct Answer: Option A

Explanation

Total distance = 2 x 160 = 320cm

Total time = \(\frac{320}{320}\) = 1s

F = \(\frac{1}{1}\) = \(\frac{1}{1}\)

= 1Hz

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A man clapping his hands at regular intervals observes that the echo of a clap...

Correct Answer: Option A

Explanation

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