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A copper rod (k = 397 W/m oC) of length 50 cm and diameter 2 cm is placed end to end with an iron rod (k = 79.5 W/m.oC) of length 50 cm and diameter 2 cm. The combined rod is then insulated on its sides and the two ends subject to different temperatures. If the copper end is at 100oC and the iron end is at 0 oC,
(a) what is the temperature at the copper-iron interface?
(b) How many joules of heat energy flow through the system in 1 hour?
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