Basing on newton's second law of motion, if the force on an object is 20n and its mass 5 g, what is its acceleration?

According to Newton's second law of motion, acceleration of the object is directly proportional to the net force in the object. It is expressed as:

F = ma

where F is the net force, m is the mass of the object and a is the acceleration.

20N = 5/1000 kg (a)
a = 4000 m/s²

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 -