Air at 2 atm and 500 K and at a rate of 12 kg/s flows across a plain plate-fin matrix of the configuration shown in Figure 10.8 and in Table 10.1 for the surface 9.68-0.870. The frontal area is 0.8 m × 0.6 m and the length of the matrix is 0.6 m. Calculate:
a. the heat transfer coefficient
b. the friction coefficient