1. Section 3.3 states that only at altitudes above 65 does the difference between the geometric and geo potential altitudes exceed I percent. Calculate the exact value of the geometric altitude at which this difference is precisely 1 percent. 2. For the flight of airplanes in the earth’s atmosphere, the variation of the acceleration of gravity with altitude is generally ignored. One of the highest-flying aircraft has been the Lockheed U-2 (see Fig. 5.52) which was designed to cruise at 70,000 ft. How much does the acceleration of gravity at this altitude differ from the value at sea level?
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