A 50% scale model of a car which has a maximum speed of 50 m/s is to be tested in a wind tunnel with a pressure of 2 atm and a temperature of 24C to determine the drag characteristic of the full-scale vehicle which operates in air with a pressure of 1 atm and temperature of 240C. Find the air speed required to test the model and find the ratio of the model drag to the full scale drag. If it is desired to have the same drag force on the model and the full-scale car, what should be the density and viscosity of the test fluid used in the tunnel if the fluid is to flow at a speed of 200 m/s? Assume air at 1 atm and 24C has = viscosity 1 x10 -6 kg/m.sec and density = 1.3 kg/m. Assume air at 2 atm and 24C has = viscosity 1.5 x10 -6. kg/m sec and density = 2.3 kg/m.