Consider a spent nuelear fuel rod of constant thermal conductivity k, perimeter p, length l, and uniform cross-sectional area ac. energy is released at a uniform rate q in w/within the rod. the left end of the rod is insulated and the right side is held at to. the outer surface of the rod is immersed in water at a temperature t and known convection coefficient h. the temperature gradients are small in all directions other than the x-direction and steady-state conditions apply. a) draw a differential control volume and show all energy transfers. b) applying the 15t law of thermodynamics, derive the governing differential equation for the temperature distribution t(a) in the rod in terms of x. q. ac, k, h, p and t- and state the boundary conditions at x = 0 and x = l.