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A whistle has a frequency of 1700 Hz. If the speed of sound in air is 340 m/s, the wavelength is:

A20 m
B2 m
C5 m
D20 cm
Answer & Solution
Correct answer: D. 20 cm
We have λ = v/ν. Then λ = 340 m/s / 1700. Then Hz = 0.2 m. So Hz = 20 cm. The high frequency of a whistle gives a short wavelength.
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