Answer to Question #328423 in Physics for Super

Question

What is the speed of sound in a helium gas at a pressure of 15000pa

Answer 1

The speed of sound in a gas

$$v_s=\sqrt{\gamma\frac{P}{\rho}}=\sqrt{\gamma\frac{RT}{M}}$$

At $t=0^\circ\rm C$

$$v_s=\sqrt{\frac{5}{3}*\frac{8.31*273}{4*10^{-3}}}=972\:\rm m/s$$