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Question

An ideal gas is kept in a long cylindrical vessel fitted with a frictionless piston of cross-sectional area 10 cm2 and weight 1 kg. The length of the gas column in the vessel is 20 cm. The atmospheric pressure is 100 kPa. The vessel is now taken into a spaceship revolving round the earth as a satellite. The air pressure in the spaceship is maintained at 100 kPa. Find the length of the gas column in the cylinder.

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Solution

P1V1=P2V2

(mgA+P0)Al=P0Al

(1×9810×104+105)0.2=105l

(9.8×103+105)×0.2=105l

= 109.8×103×0.2=105l

l=109.8×0.2102

= 0.2196 m = 0.22 m 22 cm


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