Helium gas ( ) is at temperature ; its ratio of specific heats is

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

Helium gas (

M=4\,\text{g mol}^{-1}

) is at temperature

300\,\text{K}

; its ratio of specific heats is

\gamma=1.66

. Calculate the speed of sound in helium. (a)

9.35\times10^{2}\,\text{m s}^{-1}

(b)

1.0\times10^{3}\,\text{m s}^{-1}

(c)

7.9\times10^{2}\,\text{m s}^{-1}

(d)

1.37\times10^{3}\,\text{m s}^{-1}