One piece of copper jewelry at 105 ^ { \circ } \mathrm { C }105
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C has exactly twice the mass of another piece, which is at 45 ^ { \circ } \mathrm { C } .45
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C. Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside the ( c of copper = 0.387 \mathrm { J } / \mathrm { g } \cdot \mathrm { K } ) ?=0.387J/g⋅K)?
