1. The problem statement, all variables and given/known data Hello, first question here, A copper rod and an aluminium rod are in thermal equilibrium with each other. Copper rod = 50cm long and the aluminium rod is 20cm. Radius of pair is 8cm. Copper end is heated (and maintained) at 80C , other end of pairing is 20C. k of copper is 390 and k aluminium is 210. Calculate the rate of heat flow through the pairing. 2. Relevant equations Q/t = kA.(temperature difference, theta)/l 3. The attempt at a solution Thanks for any help!