Two speres of radii r and 2r touching each other the force of attraction betweeen them is proportional

Two spheres of equal radius r are touching each other. The force of attra tion between them is proportional to

Two metals spheres of the same material and of equal radius R are touching each other.Prove that the force of attraction between them is proportional to R^4

Two spheres of the same material and same radius r are touching each other. If the gravitational force of attraction between them is directly proportional to r^n , then the value of n is :

Two spheres of the same material and same radius "r" are touching each other. If the gravitational force of attraction between them is directly proportional to r^4, then the value of n is

Two identical solid copper spheres of radius R placed in contact with each other. The gravitational attracton between them is proportional to

Two identical solid copper spheres of radius R placed in contact with each other. The gravitational attracton between them is proportional to

Spheres of the same material and same radius r are touching each other. Show that gravitational force between them is directly proportional to r^(4) .