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Problem 15 - Olympiad

What is the frequency of a wave of wavelength 2 m and speed 10 m/s?

Correct: B

Frequency (f) is given by f = v/λ, where v is the speed and λ is the wavelength. Given, v = 10 m/s, λ = 2 m. Substituting these values gives f = 10/2 = 5 Hz.