a. Geostationary satellites used for television, weather tracking, or defense purposes are satellites that remain stationary over one point on the equator, so that an antenna can always be pointed at them. How can a satellite remain stationary over one point while it orbits the Earth?
b. What must be the period of the satellite's orbit?
c. What must be the satellite's altitude above the Earth's surface? Hint: The mass of the Earth is 6.0 x 1024kg; the radius of the Earth is 6.4 x 106 m; G = 6.7 x 10-11 N m2/kg2.