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Copperpipe with a length of 2 meters, 0.0004 meters thick and a surface area of 0.12 m^{2}, is used to heat a room via hot water running through the pipe. The water running through is 80 oC. Now we assume that the room temperature outside the pipe is a constant 15 oC . The thermal conductivity in the copper is 400 \frac{W}{m\cdot K}

The question: Calculate the heat flux from the water through the copperpipe.

Is the assumption about the room temperature being 15 oC reasonable?

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