Velocity of sound in air is $332 m s^{- 1}$ . Its velocity in vacuum will be

$> 332 m s^{- 1}$

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= 332 m s^{- 1}

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< 332 m s^{- 1}

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None of these

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Solution

The correct option is D None of these
Sound waves are mechanical waves i.e., they need material medium to propagate. So they will not travel in vacuum at all! Huh!

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332 m s^{- 1}

332 m s^{- 1}

Velocity of sound in air is 332 m/s. Its velocity in vacuum will be

332 m / s

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