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The speed of a wave in a medium is 960 m/s. If 3600 waves are passing through a point in the medium in 1 min., then the wavelength of the wave is

1. 8 m
2. 12 m
3. 16 m
4. 20 m

Correct answer: 12 m

Solution

The frequency of the wave is given by f = 3600 waves / 60 s = 60 Hz. Using the wave speed formula v = fλ, we have λ = v / f = 960 m/s / 60 Hz = 16 m.

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