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the approximate values obtained in Problem 1. Problem 3 (20 points). The X-15 hypersonic research airplane set the altitude record for airplanes on August 22, 1963, when test pilot Joseph Walker achieved 354,200 ft. What is the acceleration of gravity at this altitude? How much does it differ from that at sea-level? Problem 4 (20 points). The atmosphere of Jupiter is essentially made up of Hydrogen, H2. For H2, the specific gas constant is 4157 J/(kg)(K). The acceleration of gravity of Jupiter is 24.9 m/s. Assuming an isothermal atmosphere with a temperature of 150K and assuming that Jupiter has a definable surface, calculate the altitude above that surface where the pressure is one-third the surface pressure.