PHYSICS - Waves

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Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test.

Sound waves with a wavelength of 2.5 m are traveling 7.5 m/s. How many waves will pass a microphone in 10.0 s? (Answer 30 waves)

• PHYSICS - Waves -

L = V*T = V/F = 30
F = V/L = 7.5/2.5 = 3 Hz = 3 cycles/s.

3cycles/s * 10s = 30 Cycles or waves.

• PHYSICS - Waves -

Correction: L = V*T = V/F.

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