What is newtons law of universal gravitation? what do the variables mean?

What is Newtons law of iniversal gravitation:
 that any two masses must attract ech other with a force equal to a constan (gravitation), then muliplied by the product of the two masses and then divided by the square distance between them.
What do the variables mean:
 E*grav: represents the force of gravity between two objects
Cₓ: means "proportianal to"
m₁: represents the mass of object 1
m₂: represents the mass of object 2
d: represent the distance separating the objects ' centers
        
   
                       HOPE I HELPED

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Amagnetic field "does not" interact with stationary electric charges. so, a.hope my answer you : )