Answer:
We know that initial value of
gravitational force between two objects,
(a)
If the mass of first object is doubled, then
Hence,
the force is doubled. (1/2)
(b)
If the masses of both objects are doubled, then
Hence,
the force is quadrapled. (1)
(c)
If distance between the objects is reduced to onehalf of its original value,
then
Hence,
the force is quadrapled. (1)
(d)
There is no effect on force when air medium is removed. (1/2)
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