question_answer

Consider a gas with density \[\rho \] and \[\overline{\text{c}}\] 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

A) \[\frac{1}{3}\rho {{\overline{\text{c}}}^{2}}\]                                    

B) \[\frac{1}{3}\rho {{(c+v)}^{2}}\]

C)        \[\frac{1}{3}\rho {{(\overline{c}-v)}^{2}}\]          

D)        \[\frac{1}{3}\rho {{({{\overline{c}}^{2}}-v)}^{2}}\]