A long 10-cm-diameter steam pipe whose external surface temperature is Ts constant-110 °C,the pipe passes through some open area that is not protected against the winds. The air is at

1 atm pressure and wind velocity is 8 m/s. air temperature T= 10°C. Assume the pipe surface has an Emissivity value of e=0.9. Surrounding temperature is also Tsur=10°C. Use the following property values: \text { Viscosity: } v=\frac{\mu}{\rho}=1.896 \times 10^{-3} \mathrm{~m}^{2} / \mathrm{s} Air: Thermal conductivity: k = 0.028 W/mk; Prandtl #: Pr=0.7202 \text { Stefan-Boltzmann Constant: } \sigma=5.67 \times 10^{-8} \mathrm{w} / \mathrm{m}^{2} \mathrm{k}^{4} (1) What is the Reynolds number of the air flow? (5 point) Find: