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Q. A container of volume 0.86m3 contains 7.8mol of argon gas at 20 ?C. Assuming argon behaves as an ideal gas, find the total internal energy of this gas. Reply in units of J.Given: R = 8.31451 J/mol K.

Q. The cylindrical space station, 200 m in diameter rotates in order to give artificial gravity of 3.0 g for the occupants. How much time does it take, in seconds, to complete one revolution?

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