One end of a 70-cm-long copper rod with a diameter of 2.2 cm is kept at 430 ∘C, and the other is immersed in water at 22 ∘C. Calculate the heat conduction rate along the rod.
The heat conduction rate of a rod is given by
Here, is the thermal conductivity for copper, equal to , and is the difference in temperatures. Since we are bothered with the difference in temperature, and the Celsius and Kelvin scales are related by an additive quantity, we can simply take the difference of the Celsius temperatures only.
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