I have been trying to figure this problem out for a while now and get stuck everytime. I do not understand how to go about it. Any help would be greatly appriciated. An aluminum rod and an iron rod are joined end to end in good thermal contact. The two rods have equal lengths and radii. The free end of the aluminum rod is maintained at a temperature of 100 degrees celcius, and the free end of the iron rod is maintained at 0 degrees celcius. (a) Determine the temperature of the interface between the two rods. (b) If each rod is 15 cm long and each has a cross-sectional area of 5.0 cm2(squared), what quantity of energy is conducted across the combination in 30 minutes?