Question

28. In 1.2 s, 52 wave crests spaced 0.12 m apart pass a location. What is the frequency of these waves?

Answer 1

Answer:

0.7

Explanation:

Reasoning The distance between adjacent crests is the wavelength l. Since the speed of each wave is v = 3.00 × 108 m/s and the frequencies are known, the relation v = fl can be used to determine the wavelengths. The equation v = fl applies to any kind of periodic wave.

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Answer 2

Frequency = (number of waves) / (time)

(52waves) / (1.2 sec) = 43.333 Hz.