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A) A stainless steel bar 11.8 cm long is welded end to end to a copper...

A) A stainless steel bar 11.8 cm long is welded end to end to a copper bar 22.6 cm long. Each bar has a square cross section, 2.0 cm on a side. The free end of the stainless steel bar is kept at 100∘C by placing it in contact with steam, and the free end of the copper bar is kept at with 0∘C by placing it in contact with ice. Both bars are perfectly insulated on their sides. What is the total rate of heat flow through the bars?

Thermal conductivity of steel and copper are respectively 14W/mK and 390W/mK.

B) Suppose the bars of part A) are separated. One end of each bar is kept at 100∘C and the other end of each bar is kept a 0∘C. What is the total rate of heat flow in the two bars now?

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