2. A rectangular aluminum fin (k = 200 W/mC), 3 mm thick and 7.5 cm long protrudes from a wall. The base is maintained at 300C, and the ambient temperature is 50C with h = 10 W/m2 C. Calculate: (a) the heat loss from the fin per unit depth of material (w) assuming convection at the fin tip; (b) the fin efficiency; (c) the fin effectiveness; (d) the total effectiveness for a 1 m-long wall (H = 1 m) having 100 of these fins.