Lag1989 problem number 8.45

Lag1989 problem number 8.45

The distance between the walls of the Dewar vessel is L = 10 mm. Assess at what pressure the thermal conductivity of air located between the walls of the vessel begins to decrease when it is pumped out? Air temperature t = 10 ° С. The effective diameter of the air molecule is d = 0.3 nm.

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