6-98 Air at 1 atm and 20°C is flowing over the top surface of a o.2-m x 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 o.3 N, determine the surface temperature of the metal foil. Evaluate the air properties at 100°C and 1 atm. Is this a good assumption