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  4. The wavelength of sound in air is 10 cm Its frequency is (Take velocity of sound .=330 m s -1)

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Q. The wavelength of sound in air is 10 cm Its frequency is (Take velocity of sound $\left.=330 \,m \,s ^{-1}\right)$

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Solution:

$ \lambda=10\, cm , v=330\, m / s$
$\Rightarrow v=\frac{v}{\lambda}$
$=\frac{330 m / s }{0.1 m }=3300 Hz$
$ =3.3\, kHz$