Physics - Sound Wave Question with Solution | TestHub

The speed of sound in a gaseous medium is given by, $v=\sqrt{\frac{\gamma RT}{m}}$, where $y$ is the ratio of $\frac{C_P}{C_v},R$ is the universal gas constant, $m$ is the molecular weight of the gas and $T$ is the temperature of the gas. Therefore, $v\propto \frac{1}{\sqrt{m}}$ $\Rightarrow \frac{v_1}{v_2}=\sqrt{\frac{m_2}{m_1}}$