Communication satellites are placed in a geosynchronous orbit - that is, in a circular orbit such that they complete one full revolution about the earth in one sidereal day (23.934 h), and thus appear stationary with respect to the ground. Determine ( a ) the altitude of these satellites above the surface of the earth, (b) the velocity with which they deseribe their orbit. Give the answers in both SI and U.S. customary units. | Numerade