Air at 1 atm and 20C is flowing over the top surface of a 0.2 m

Question:

Air at 1 atm and 20°C is flowing over the top surface of a 0.2 m × 0.5 m-thin metal foil. The air stream velocity is 100 m/s and the metal foil is heated electrically with a uniform heat flux of 6100 W/m². If the friction force on the metal foil surface is 0.3 N, determine the surface temperature of the metal foil. Evaluate the fluid properties at 100°C.