AW1[Hole between two rooms] A container is divide

1/4

into two rooms, I and II, by a partition with a sma

hole of diameter. Helium gas in the two rooms is he

at temperatures T₁ =150 K and T₂=300 K

respectively, through heating of the walls. Figure

ADescribe what happen in the effusion regime an

diffusion regime and discuss by which conditions the

gases come to the steady state?

BWhat is the ratio of the mean free paths/2

reaching the steady state when d <

CWhat is the ratio of the mean free paths/12

reaching the steady state when d» l₁, d » 12.