The fin in Problem 3-61 is initially uniform in temperature at 200C, and then suddenly exposed to

The fin in Problem 3-61 is initially uniform in temperature at 200ºC, and then suddenly exposed to the convection boundary and heat generation. Select a value for ∆τ and calculate the nodal temperatures for 10 time increments. Take ρ = 7600 kg/m3 and c = 450 J/kg · ºC. The base stays constant at 200ºC.