Required information consider a very long rectangular fin attached to a flat surface such that the temperature at the end of the fin is essentially that of the surrounding air, that is, 20°c. its width is 5.0 cm, thickness is 1.0 mm, thermal conductivity is 200 w/m·k, and base temperature is 65°c. the heat transfer coefficient is 20 w/m2·k. estimate the fin temperature at a distance of 5.0 cm from the base. the fin temperature is 42 42 correct °c. explanation