A body moves through air at a velocity of 200 m/s. The pressure and temperature in the air upstream of the body are 100 kPa and 30◦ C respectively. Find the pressure at a point on the body where the velocity of the air relative to the body is zero (1) accouting for compressibility and (2) assuming incompressible ﬂow. Assume that the ﬂow is isentropic. I have no clue! Please, help me! I'm in way over my head here.