Consider a flat plate subject to parallel flow characterized by u = 5 m/s, T = 20 C. Air (p = 1 atm, T = 25 C = 298 K): Pr = 0.708, k = 26.1 10-3 W/m K, = 1.571 10-5 m2/s, = 1.171 kg/m3. Air (p = 1 atm, T = 50 C = 323 K): Pr = 0.704, k = 28.0 10-3 W/m K, = 1.82 10-5 m2/s, = 1.085 kg/m3. Water (T = 298 K): Pr = 6.15, k = 0.610 W/m K, = 8.99 10-7 m2/s, = 997 kg/m3. Water (T = 323 K): Pr = 3.56, k = 0.643 W/m K, = 5.543 10-7 m2/s, = 988 kg/m3. (a) Determine the average convection heat transfer coefficient and convective heat transfer rate associated with a L = 2mlong, w = 3mwide flat plate for airflow and surface temperatures of T s = 30 C and 80 C. Assume that both the top and bottom sides of the plate are exposed to the flow. Answers: T s = 30 C: 8.79 W/m 2 K; 1055 W