Race cars at the Indianapolis Speedway average speeds of185 mi/h. After determining the altitude of Indianapolis,fi nd the Mach number of these cars and estimate whethercompressibility might affect their aerodynamics.

Air flows supersonically toward the double-wedge systemin Fig. . The (x, y) coordinates of the tips are given.The shock wave of the forward wedge strikes the tip of theaft wedge. Both wedges have 15° deflection angles. Whatis the free-stream Mach number?

Sparky is power washing a brick wall and needs to perform a dimensional analysisto determine if the force from the power washer is enough to tip over the brick wall. The velocityout of the power washer that can tip the brick wall (V) is a function of the fluid density (ρ),diameter of the exit nozzle of the power washer (D), the weight of the brick wall (W), the width ofthe brick wall (b), and the distance between the power washer nozzle exit and the brick wall (d).How many dimensionless groups are required? Generate the dimensionless groups. Use theFLT system of units. Some, but not all, of the dimensionless groups may be determined byinspection.

Pu Wings at supersonic flows can be modeled as a flat plate that have constant pressure distributions across their chord. Ignoring any viscous effects determine the drag force of the wing section. Round to the full N/m and make sure you use the standard sign convention (i.e. right hand rule). Use the following data chord = 1.5 m epsilon = 5 degree angle of attack = 20.0 alpha upper surface pressure = 60,000 Pa lower surface pressure = 150,000 Pa