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The wavelength of sound in air is 10 cm. Its frequency is:

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330 cycle per sec

3.3 kilocycle per sec

30 megacycle per sec

$3 \times 10^{9}$ cycle per sec

answer is B.

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Detailed Solution

$v = f λ 330 = f 10 \times 10^{- 2} f = 3300 H z$

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