Consider a gas with density `'rho'` and `overlinec` as the root mean square velocity of its molecules contained in a volume. If the system moves as whole with velocity 'v' , then the pressure exerted by the gas is

Options

A. `(1)/(3)rhobar(c)^(2)`
B. `(1)/(3)rho(c+v)^(2)`
C. `(1)/(3)rho(bar(c)-v)^(2)`
D. `(1)/(3)rho(c^(-2)-v)^(2)`