Q4 A hot surface at 100 °C is to be cooled by attaching 3-cm long, 0.25-cm diameter aluminum pin fins (k = 237 W/m/K) to it, with a center-to-center distance of 0.6 cm. The temperature of the surrounding medium is 30 °C, and the heat transfer coefficient on the surface is 35 W/m²/K. Determine the rate of heat transfer from the surface for a 1 m by 1 m section of the plate. Also determine the effectiveness of the fins ( Assume adiabatic tip conditions) 3 cm, 0.6 cm 0.25 cm