First slide

Speed of wave

Question

Speed of sound in air 332 m/sec at N.T.P. The speed of sound in hydrogen at N.T.P. will be

Moderate

Solution

$\begin{array}{l} V a = \sqrt{(\frac{γ R T}{M_{a}})} \\ V_{H} = \sqrt{(\frac{γ R T}{M_{H}})} \\ \frac{V_{H}}{V_{a}} = \sqrt{\frac{M_{a}}{M_{H}}} \end{array}$

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