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Air at 1 atm and 20 deg C is flowing over the top surface of a 0.2 m X 0.5 m-long metal foil. The air stream velocity is 100 m/s and the metal foil is heated electronically with a uniform heat flux of 6100 W/m^2. 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 deg C.
the velocity of a lift increases uniformly from zero to its maximum value at mid-height (1.4m) in 7.5s and then decreases uniformly to zero in 7.5s. The peak power output is 6kW when the velocity is maximum, determine the maximum lift force provid..
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