If `rho` is the mean density of the earth and R is its radius, then the critical speed of a satellite revolving very close to the surface of earth is :

These orbital speed of satellite revolving very close to earth

What is the periodic times of a satellite revolving very close to the surface of the earth, of density rho ?

The critical speed of a satellite orbiting very close to the surface of the earth is [g=10 m//s^(2) and R=6.4xx10^(-6)m]

If g_(h) is the acceleration due to gravity at a height h above the earth's surface and R is the radius of the earth then, the critical velocity of a satellite revolving round the earth in a circular orbit at a height h is equal to

Peridic-time of satellite revolving around the earth is (rho density of earth) .