An airfoil is being tested at an altitude of 34000 ft, Ask an Expert

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An airfoil is being tested at an altitude of 34000 ft, standard atmosphere, and a speed of 600 knots. At a specific point "A.'' the pressure is measured to be at eighty-seven percent (87%) of the free tream pressure.

Determine the local velocity and Mach number at point ''A'' assuming isentropic flow.

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