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A student doing an experiment pours 0.15 kg of heated copper shot into a 0.375 kg...

A student doing an experiment pours 0.15 kg of heated copper shot into a 0.375 kg aluminum calorimeter cup containing 0.2 kg of water at 250 C. The mixtures (and the cup) comes to thermal equilibrium at 280 C. What was the initial temperature of the shot?

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