Posted by **Anna** on Wednesday, March 13, 2013 at 6:50pm.

At a fabrication plant, a hot metal forging has a mass of 74 kg and a specific heat capacity of 430 J/(kg·C°). To harden it, the forging is quenched by immersion in 710 kg of oil that has a temperature of 32°C and a specific heat capacity of 3000 J/(kg·C°). The final temperature of the oil and forging at thermal equilibrium is 47°C. Assuming that heat flows only between the forging and the oil, determine the initial temperature of the forging.

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