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A pipe 0.0178 m in diameter and 0.16 m long can transfer 3726 J of heat per second with a temperature difference across the ends of 5?C. Compare this performance with the heat transfer of a solid silver bar of the same di- mensions by finding the ratio of the given heat to that of the silver bar. The thermal conduc- tivity of silver is 427 W/m · ? C. (Silver is the best heat conductor of all metals.)

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