Standard air with velocity V flows past an airfoil having a chord length, b, of 6 ft. (a...

Standard air with velocity V flows past an airfoil having a chord length, b, of 6 ft. (a) Determine the Reynolds number, (b) If this airfoil were attached to an airplane flying at the same speed in a standard atmosphere at an altitude of 10,000 ft, what would be the value of the Reynolds number?