A cubic vessel (with faces horizontal + vertical) contains an ideal g

1.	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 500m s-1 in vertical direction. The pressure of the gas inside the vessel as observed by us on the ground(a) remains the same because 500ms-1 is very much smaller than vrms of the gas.(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) will increase by a factor equal to (V2rms (500)2) / V2rms where Vrms was the original mean square velocity of the gas.(d) will be different on the top wall and bottom wall of the vessel.
Answer» (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. Comment for discussion: This brings in concepts of relative motion and that when collision takes place, it is the relative velocity which changes.

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 500m s-1 in vertical direction. The pressure of the gas inside the vessel as observed by us on the ground(a) remains the same because 500ms-1 is very much smaller than vrms of the gas.(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) will increase by a factor equal to (V2rms (500)2) / V2rms where Vrms was the original mean square velocity of the gas.(d) will be different on the top wall and bottom wall of the vessel.

Answer»

(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.

Comment for discussion: This brings in concepts of relative motion and that when collision takes place, it is the relative velocity which changes.

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