A spherical Pyrex glass shell has inside and outside diameters of D = 0.1 m and D2 = 0.2 m, respectively. The inner surface is at T =100°C while the

outer surface is at T,2 = 45°C (a) Determine the temperature at the midpoint of the shell thickness, T(rm = 0.075 m). (b) For the same surface temperatures and dimensions as in part (a), show how the midpoint temperature would change if the shell material were aluminum.