The earth revolves round the sun in one year. If the distance between them becomes double, the new period of revolution will be

The earth revolves round the sun in an elliptical orbit. Its speed

If the distance between the earth and sun becomes 1//4^(th) then its period of revolution around the sun wi ll become

Two satellites S and S' revolve around the earth at distance 3R and 6R from the centre of the earth. Their periods of revolution will be in the ratio

A satellite is revolving around earth in its equatorial plane with a period T . If the radius of earth suddenly shrinks to half without change in the mass. Then, the new period of revolution will be

When the earth revolves round the sun in an elliptical orbit, its kinetic energy is

If the distance between the earth and moon were doubled, the gravitational force between them will be

In a certain binary star system, each star has the same mass as our sun. They revolve about their centre of mass. The distance between them is the same as the distance between earth and the sun. What is their period of revolution in years ?

In a certain binary-star system, each star has the same mass as our Sun, and they revolve about their center of mass. The distance between them is the same as the distance between Earth and the Sun. What is their period of revolution in years ?