4. It's possible to place a satellite into orbit about the earth so that it remains fixed above a given location on the equator. Compute the altitude that is needed for such a satellite. The earth's mass is 5.98 X 104 kg; its radius is 6.37 × 10° m. (This orbit is called the Clarke Geosyn- chronous Orbit after Arthur C. Clarke, who first proposed the idea in 1945. The first such satellite, Syncom II, was launched in July 1963.)

4. It's possible to place a satellite into orbit about the earth so that it remains fixed above a given location on the equator. Compute the altitude that is needed for such a satellite. The earth's mass is 5.98 X 104 kg; its radius is 6.37 × 10° m. (This orbit is called the Clarke Geosyn- chronous Orbit after Arthur C. Clarke, who first proposed the idea in 1945. The first such satellite, Syncom II, was launched in July 1963.)