In a balloon filled with helium

PHYSICS · Subjective · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

In a balloon filled with helium, the gas temperature is

300\,\text{K}

. The ratio of specific heats for helium is

1.67

and its molar mass is

4.0\,\text{g mol}^{-1}

. Calculate the speed of sound in helium in the balloon.