A pipe 0.0277 m in diameter and 0.37 m long can transfer 3657 J of heat per second with a temperature difference across the ends of 10◦C. Compare this performance with the heat transfer of a solid silver bar of the same dimensions by finding the ratio of the given heat to that of the silver bar. The thermal conductivity of silver is 427 W/m · ◦ C. (Silver is the best heat conductor of all metals.)