Q. 1 A 50 cm diameter pipeline in the Arctic Carries hot oil at 30 0C and exposed to a coefficient surrounding temperature of -20 0C. Special powder insulation 5 cm thick surrounds the pipe and has a thermal conductivity of 7 mW/m. 0C. The Convective heat transfer on the outside of the pipe is 9 W/m2. 0C. Estimate the energy loss from the pipe per meter of length. (1.7, pp. 19) [5M]