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Suppose the temperature of a copper block 1 -10C to 10C; a block 2 steel from 0C to 20C ; a block 3 of nickel

Suppose the temperature of a copper block 1 -10C to 10C; a block 2 steel from 0C to 20C ; a block 3 of nickel from -5C to 15C. which one do I add more heat? (the three blocks have a mass of m=1kg) how much heat is needed to increase 20C a kilogram of water?

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