Consider a large plane wall of thickness l 5 0.3 m, thermal conductivity k 5 2.5 w/m·k, and surface area a 5 12m2.theleftsideofthewallatx50issub jectedtoanet heat flux of q·0 5 700 w/m2 while the temperature at that sur- face is measured to be t1 5 80°c. assuming constant thermal conductivity and no heat generation in the wall, (a) express the differential equation and the boundary conditions for steady one-dimensional