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A tall thermally insulated shaft contains 50kg of water at 20C. At the top of the shaft, at h=100m there is a 7.5kg mass of

A tall thermally insulated shaft contains 50kg of water at 20C. At the top of the shaft, at h=100m there is a 7.5kg mass of aluminum at 20C. The mass is dropped to the base, comes at rest, and comes to thermodynamic equilibrium with water. Using the date given below, find the final temperature? g=9.81m/s21cal=4.18JcpAl=0.9kJ/kg.K

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