Give four features of gravitational force?

Gravitational force is

what is the order of the ratio of the gravitational force and the electrical force acting between two electrons?

The force of gravitation between two spherical masses M and m, placed in air, is F . The space between the two spheres is filled with a liquid of relative density 3. What will be the change in the value of the gravitational force acting between the spheres ?

The gravitational field in a region is given by vecE=(5N*kg^(-1))hati+(12N*kg^(-1))hatj (i) Find the magnitude of the gravitational force acting on a particle of mass 2kg placed at the origin.

Give a feature of Arthopoda?

Four particles of masses m, 2m, 3m and 4m are placed at the four corners of a square of side a. Find the gravitational force on a particle of mass m placed at the centre of the square.