During test-run, air flows at 215 m/s velocity and 25 degree Celsius temperature past a smooth thin model airfoil which can be idealized as a flat plate. If the chord length of the airfoil is 15 cm, find drag per unit width. The relevant physical properties of air arep = 1.82 kg/m3v = 15.53 * 10 -6 m2/s

During test-run, air flows at 215 m/s velocity and 25 degree Celsius

1.	During test-run, air flows at 215 m/s velocity and 25 degree Celsius temperature past a smooth thin model airfoil which can be idealized as a flat plate. If the chord length of the airfoil is 15 cm, find drag per unit width. The relevant physical properties of air arep = 1.82 kg/m3v = 15.53 * 10 -6 m2/s
A.	25.42 N per unit width
B.	35.42 N per unit width
C.	45.42 N per unit width
D.	55.42 N per unit width
Answer» B. 35.42 N per unit width

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