A non-equilibrium sample of gas in a cube has unequal mean squared velocity…

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

A non-equilibrium sample of gas in a cube has unequal mean squared velocity components such that

\langle v_x^{2}\rangle = 2\langle v_y^{2}\rangle = 2\langle v_z^{2}\rangle

. The number density and particle mass are uniform throughout the container. What is the ratio

P_x / P_y

of the pressure exerted on the wall perpendicular to the

x

-axis to that exerted on the wall perpendicular to the

y

-axis? (a)

1

(b)

2

(c)

\sqrt{2}

(d)

\dfrac{1}{2}