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DAM-132 A one-fourth scale model of a car is to be tested in a wind tunnel. The ...
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DAM-132 A one-fourth scale model of a car is to be tested in a wind tunnel. The conditions of the actual car are V = 45 km/h and T = 0 degree-C and the air temperature in the wind tunnel is 20 degree-C. In order to achieve similarity between the model and the prototype, the wind tunnel is run at 204 km/h. If the average drag force on the model is measured to be 70 N, the drag force on the prototype is (The properties of air at 1 atm and 0 degree-C: rho = 1.292 kg/m^3, nu= 1.338x10^-5 m^2/s ; The properties of air at 1 atm and 20 degree-C: rho = 1.204 kg/m^3, nu = 1.516x10^-5 m^2/s)
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