Consider a flat plate in a supersonic flow at an angle of attack as shown in the figure above, and assume the flow is inviscid. We will learn later in the course that the resulting flow is such that the pressure is uniform on both the upper surface and lower surface of the plate, but of a different magnitude: the pressure on the upper surface, , is lower than the pressure on the lower surface, .
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It would help if you proofread your questions before you posted them. No figure available. Pressure values missing.