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The temperature at which the speed of sound in air becomes double of its value at $27^{o} C$ is

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54oC

327oC

927oC

−123oC

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detailed solution

Correct option is C

v=γRTM⇒v∝T i.e. if v is doubled then T becomes four times, hence T2=4T1=4(273+27)=1200K=927°C

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The temperature at which the speed of sound in air becomes double of its value at 27oC is

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The temperature at which the speed of sound in air becomes double of its value at $27^{o} C$ is