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An isolated system with a 10 kg lead ball and 1 kg water at the temperature of 20 o C before. Then 10 kg lead

An isolated system with a 10 kg lead ball and 1 kg water at the temperature of 20oC before. Then 10 kg lead drops from a 100 m height slowly to the bottom of the water. When the system reaches equilibrium what is the final temperature? Assume no energy is exchanged with the surroundings. The specific heats of Pb and water are 130 J/kg*Co and 4182 J/kg*Co.

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