7.38 Determine the convection heat transfer coefficient, thermal resistance for convection, and the convection heat transfer rate that are associated with air at atmospheric pressure in cross flow over a cylinder of diameter D=100 mm and length L=2 m. The cylinder temperature is Ts=70 o C while the air velocity and temperature are V=3 m/s and T [infinity] =20 o C, respectively. Plot the convection heat transfer coefficient and the heat transfer rate from the cylinder over the range 0.05 m ≤ D ≤ 0.5 m.