A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with boiling water (at atmospheric pressure) at one end and with an ice-water mixture at the other (Fig. 17.31). The rod consists of a 1.00-m section of copper (one end in boiling water) joined end to end to a length L, of steel (one end in the ice-water mixture). Both sections of the rod have cross sectional areas of 4.00 cm2. The temperature of the copper steel junction is 65.0°C after a steady state has been setup.
(a) How much heat per second flows from the boiling water to the ice-water mixture?
(b) What is the length L2of the steel section?

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