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A 218kg rock sits in full sunlight on the edge of a cliff 4.90m high. The temperature of the rock is 29.1%u2218C.

If the rock falls from the cliff into a pool containing 7.00m3 of water at 16.3%u2218C, what is the final temperature of the rock-water system? Assume that the specific heat of the rock is 1010.

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