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  1. ...b) Let t be the final temperature of the coffee. Heat agined by copper spoon = (100/1000) x 370 x (t'-20) J Heat lost by coffee = (250/1000) x...

  2. ...kinetic energy of the water molecules=temperature of the cup of water 而 internal energy = K.E.(KINETIC...or internal energy. 9.tea有水,water的specific heat capacity比metal spoon 高,所以water每一kg每降一度所release的ENERGY,比metal...