A brass condenser tube [k= 115 W/(m. C)] with an outside diameter of 2 cm and a thickness of 0.2 cm is used to condense steam on its outer surface at 50C with a heat transfer coefficient of 2000 W/(m. C). Cooling water at 20C with a heat transfer coefficient of 5000 W/(m. C) flows inside. (a) Determine the heat flow rate from the steam to the cooling water per meter of length of the tube. (b) What would be the heat transfer rate per meter of length of the tube if the outer and the inner surfaces of the tube were at 50C and 20C, respectively? Compare this result with (a), and explain the reason for the difference between the two results.