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Two cylindrical metal rods-one copper, the other lead-are connected in parallel with a temperature of 22.0 C at one end and 113 C at the other end. Both rods are 0.660m in length, and the lead rod is 2.76cm in diameter. If the combined rate of heat flow through the two rods is 33.2J/s , what is the diameter of the copper rod?

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