The satellite that revolves in polar orbit around the earth is called a______ satellite.

Polar satellite may be called as ______ or ______ satellite.

A satellite is to be placed in equatorial geostationary orbit around earth for communication. Find out the minimum number of satellites that are needed to cover entire earth so that aat least one satellite is visible from any point on the equator. [ M = 6 xx 10^24 kg, R = 6400 km, T = 24 h, G = 6.67 xx 10^-11 SI units]

A satellite of mass 'm' is revolving in a circular orbit of radius 'r' around the earth of mass M. What is the total energy of the satellite?

An artificial satellite is revolving around the earth without using any fuel. On the other hand an aeroplane requires fuel to fly. Why?