Two metal rods, one lead, the other copper. Each rod is 0.525 m in length, and has a square cross section 1.50 cm on a side. The temperature at the lead end of the rod is 2.00 "C, and the temperature at the copper end is 106 'C, as shown. (a) The average temperature of the two ends is 54 'C. ls the temperature in the middle, at the lead-copper interface, greater than, less than, or equal to 54 "c? Explain. (b) Given that the heat flow through each of these rods in 1.00 s is 1.41 J, find the temperature at the lead-copper interface.