Helium is a monatomic gas that has a density of `0.179 kg//m^(3)` at a pressure of `76 cm` of mercury and a temperature of `0^(@) C` . Find the speed of compressional waves (sound) in helium at this temperature and pressure.

Answer

B

Explanation

`nu = sqrt((gamma P)/(rho)) = sqrt (((5//3) xx 0.76 xx 13.6 xx 10^(3) xx 9.8)/(0.179))`
Where `P = h rho g`
:. `nu = 972 m//s`