The tidal waves in the sea are primarily due to

The gravitational constant depends upon .........

What is the vector form of the universal law of gravitation?

Three particles each of mass $M$ are placed at the three corners of an equilateral triangle of side $l$. What is the gravitational force due to this system of particles on another particle of mass $m$ placed at the midpoint of any side?

If the distance between two masses is doubled,the gravitational attraction between them

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