A sample of a gas has volume V and contains N molecules, each of mass m. The average translational speed of the molecules is u.
Which expression is equivalent to the pressure of the gas?
A. 1/3(NV/m)u²
B. 1/3(Nm/V)u²
C. 1/3(N/mV)u²
D. 1/3(m/NV)u²