Physics
The wavelength of waves produced on the surface of water is 20 cm. If the wave velocity is 24 ms-1, calculate (i) the number of waves produced in one second and (ii) the time in which one wave is produced.
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Answer
(i) As we know,
Velocity (V) = frequency (f) x wavelength (λ)
Given,
V = 24 ms-1
λ = 20 cm
Converting cm to m, we get,
100 cm = 1 m,
1 cm = m = 0.01 m,
Therefore, 20 cm = (20 x 0.01) m = 0.2 m
Hence, λ = 0.2 m
Substituting the values in the formula above, we get,
Therefore, the number of waves produced in one second = 120 s-1
(ii) As we know,
Time in which one wave is produced (t) =
Substituting the values in the formula above, we get,
Hence,
Time in which one wave is produced = 8.3 x 10-3 s
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