Consider a gas with density and as the root mean square velocity of its molecules

PHYSICS · Single correct · CBSE · Physics · Kinetic Theory · Kinetic Theory

Problem

Consider a gas with density

\rho

and

\bar{c}

as the root mean square velocity of its molecules. If the system moves as a whole with velocity

v

, then the pressure exerted by the gas is: (1)

\frac{1}{3}\rho\bar{c}^2

(2)

\frac{1}{3}\rho(\bar{c}+v)^2

(3)

\frac{1}{3}\rho(\bar{c}-v)^2

(4)

\frac{1}{3}\rho(\bar{c}^2-v^2)