The upward-facing surface of an inclined surface that is 1.0 m wide and 80 cm long is subject to a UHF boundary condition with The angle of inclination with respect to the vertical plane is The...

The upward-facing surface of an inclined surface that is 1.0 m wide and 80 cm long is subject to a UHF boundary condition with
The angle of inclination with respect to the vertical plane is
The surface is exposed to atmospheric air at an ambient temperature of 300 K.

Air flows parallel to the surface in the upward (assisting) direction at a velocity of 0.05 m/s. Calculate the average Nusselt number and heat transfer coefficient for the surface. Compare the result with purely free-convection and purely forced-convection Nusselt numbers.