An airfoil is placed on the test section of a wind tunnel where the test section radius is 3 inches and inlet air velocity is 4 ft/s. a. Calculate the velocity around the airfoil if the diameter of the inlet is 9 inches. b.What is the pressure difference between the test section and the inlet c. If the pressure of the inlet is at 2116.6 psf, calculate the pressure at test section.

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