1.

5 kg of air is contained in a vertical piston cylinder assembly with the top open to the atmosphere. The piston weighs 50 kg and has   a face area of 0.01 m2 . The air initially occupies a volume of 0.005 m3 . The air now undergoes a process wherein its volume decreases    to 0.0025 m 3 and 1.5 kJ of heat is lost to the surroundings. The change in the specific internal energy of the air is​

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ANSWER:

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Explanation:

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