In class we derived a differential equation that governs the spatial temperature distribution inside a fin with uniform cross-sectional area that is exposed to convection. Beginning with a differential control volume, derive a differential equation that governs the spatial temperature distribution inside a fin with uniform cross-sectional area that is exposed to both convection (with T. and h) and a uniform radiation heat flux arad. Assume conduction inside the fin is 1- D, steady state, constant properties, no heat generation inside the fin, that the base temperature of the fin To is higher than T., and grad is into the fin.