The ratio of KE of a planet at the points `1` and `2` is :

The ratio of the distance of two planets from the sun is 1:2 . Then ratio of their priods of revolutions is

The ratio of the radii of planets A and B is k_(1) and ratio of acceleration due to gravity on them is k_(2) . The ratio of escape velocities from them will be

The ratio of the radii of the planets P_(1) and P_(2) is a the ratio of their acceleraton due to gravity is b the ratio of the escape velocity form them will be

The ratio of the radii of the planets R_(1) and R_(2) is k. the ratio of the accelerationn due to gravity is r. the ratio of the escape velocities from them will be

The ratio of the radii of the planets P_(1) and P_(2) is k. the ratio of the accelerationn due to gravity is r. the ratio of the escape velocities from them will be

If the ratio of the weights of a body of mass 'm' measured on two different planets 'A' and 'B' is 1 : 2 and the ratio of radii of two planets 'A' and 'B' is 2 : 4, respectively, then the ratio of the masses of two planets is, respectively ______ .

The ratio of the radii of the planets P_(1) and P_(2) is K_(1) . the ratio of the acceleration due to gravity is K_(2) . the ratio of the escape velocities from them will be

The ratio of the distance of two planets from the sun is 1:2. The ratio of their periods of revolution is