Two spheres of masses $m$ and $M$ are situated in air and the gravitational force between them is $F$. The space around the masses is now filled with a liquid of specific gravity $3$. The gravitational force between the bodies will now be

Two particles of mass $m_{1}$ and $m_{2}$ approach each other due to their mutual gravitational attraction only. Then,

Let $G, W, E$ and $S$ be the relative strengths of gravitational, weak-nuclear, electromagnetic, and strong-nuclear forces, respectively. Which of the following statements is correct?

The mass of the Earth has been determined through:

$A$ uniform sphere of mass $M$ and radius $R$ is surrounded by a concentric spherical shell of the same mass but radius $2R$. $A$ point mass $m$ is kept at a distance $x$ $(R < x < 2R)$ in the region bounded by the spheres as shown in the figure. The net gravitational force on the particle is:

The gravitational force $F_g$ between two objects does not depend on