JAMB - Physics (2008 - No. 5) | ExamPlay

JAMB - Physics (2008 - No. 5)

What is the frequency of vibration if the balance wheel of a wrist watch makes 90 revolutions in 25 s?

0.01 Hz

0.04 Hz

2.27 Hz

3.60 Hz

Giải thích

Frequency = (No. of revolutions)/ Time = (90)/25 = 3.6 Hz

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