Two planets A and B have their radii in the ratio r. The ratio of acceleration due to gravity on the planets is x. what is the ratio of the escape velocity from the two planets ?

The value of acceleration due to gravity of a planet having mass and radius twice those of the earth is.

The ratio of the masses of two planets is 2 : 3 and the ratio of their radii is 3:2 The ratio of acceleration due to gravity on these two planets is

The ratio of acceleration due to gravity g_1:g_2 on the surface of two planets is 5:2 and the ratio of their respective average densities rho_1:rho_2 is 2:1 . What is the ratio of respective escape velocities v_1:v_2 from the surface of the planets?

The ratio of the radii of two spheres is 5:2 and that of their charges is 5:3. Determine the ratio of the surface densities of charge of the two spheres.

The ratio of the mass of the moon to that of the earth is 1:81. If the radius of the moon is assumed to be one-fourth of that of the earth , then what is the acceleration due to gravity on the surface of the moon in terms of that on the earth's surface ? Hence, find the escape velocity from the surface of the moon in terms of that from the earth's surface.

The ratio of accelerations due to gravity g_(1):g_(2) on the surfaces of two planets is 5:2 and the ratio of their respective average densities p_(1):p_(2) is 2:1. What is the ratio of respective escape velocities v_(1):v_(2) from the surface of the planets?