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A cubic vessel (with faces horizontal + ...

A cubic vessel (with faces horizontal + vertical) contains an ideal gas at NTP. The vessel is being carried by a rocket which is moving at a speed of `500 ms^-1` in vertical direction. The pressure of the gas inside the vessel as observed by us on the ground.

A

(a) remains the same because `500 ms^-1` is very much smaller than `v_(rms)` of the gas.

B

(b) remains the same because motion of the vessel as a whole does not affect the relative motion of the gas molecules and the walls.

C

(c) Will increase by a factor equal to `V_(rms)^2 + (500)^2)//v^2_(rms)` where `v_(rms)` was the original mean square velocity of the gas.

D

(d) will be different on the top wall and bottom wall of the vessel.

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