The pressure in a chamber filled with gas arises from A. the gravitational inter

Question

The pressure in a chamber filled with gas arises from A. the gravitational interaction between the atoms and molecules of the gas. B. collisions between the molecules of the gas itself. C. collisions between the molecules of the gas and the walls of the chamber. D. the the electromagnetic force between the atoms and molecules of the gas. E. None of these. 2. (2 pointts) If the temperature of a sealed rigid chamber full of gas is increased, the pressure will A. increase proportionally B. remain constantt C. decrease proportionally D. first decrease then increase E. None of the above. 3. (2 pointts) If the thickness of a uniform wall is doubled. the rate of heat transfer through the wall is A. quadrupled B. doubled C. unchanged D. halved E. quartered

Explanation / Answer

part 1 )

C . because after collision their velocity increase that put more pressure on wall .

part 2 )

A

here volume is constant , and pressure is proportional to temprature

so here if we increased temprature , pressure will increase proportioanlly

part 3 )

q = kAdT/x

q is inversly proportioanl to thickness , if we doubled the thickness then heat transfer through the wall is halved

D

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