A communications Earth satallite

A communications Earth satellite

A communication satellite is revolving around the earth very close to the surface of the earth of radius R . Then the period of communication satellite depends upon

A communication satellite of mass 500kg revolves around the earth in a circular orbit of radius 4.0xx10^(7)m in the equatorial plane of the earth in the direction from west to east. The magnitude of angular momentum of the satellite is

A communication satellite is put in parking orbit. What is the time taken by a wave to go to satellite and come back to earth in its checking mode.

The height of a communication satellite from the earth's surface is about