Conduction of heat: Two metal rods, one silver and the other copper, are both attached to a steam chamber as shown in the figure, with a temperature of 100°C, at one end, and an ice water bath, with a temperature of 0°C, at the other. The rods are 5.0 cm long and have a square cross-section, 2.0 cm on a side. When steady state has been reached, how much heat flows through the two rods in 1.0 min? The thermal conductivity of silver is 417 W/(m ∙ K) , and that of copper is 395 W/(m ∙ K) . No heat is exchanged between the rods and the surroundings, except at their ends. 
A) 20 kJ
B) 39 kJ
C) 47 kJ
D) 49 kJ
E) 11 kJ
Correct Answer:
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