Find the velocity of a satellite at height 80 km from earth. If the radius of earth is 6400 km

Find the weight of a body at a height of 100 km above the surface of earth. The radius of earth is 6,400 km and the body weighs 90 N on earth's surface.

An earth's satellite makes a circle around the earth in 90 minutes. Calculate the height of the satellite above the earth's surface. Given radius of the earth is 6400 km and g=980 cms^(-2)

An artificial satellite circulating the earth is at a height 3400km from the surface of the earth, if the radius of the earth is 6400km and g=9.8m/s^2 . calculate the orbital velocity of the satellite.

An Earth's satellite makes a circule around the Earth in 100 minutes. Calculate the height of the satellite above the Earth's surface. Given the radius of the Earth is 6400 km g = 10 ms^(-2) . Use pi^(2) = 10 .

Find the ratio of the orbital speeds of two satellites of the earth if the satellites are at height 6400 km and 19200 km. (Radius of the earth = 6400 km).

An artificial satellite is revolving in a circular orbit at height of 1200 km above the surface of the earth. If the radius of the earth is 6400 km and mass is 6xx10^(24) kg , the orbital velocity is