An object of mass 100 kg is initially at rest on a horizontal frictionless surface. at timet-0, a horizontal force of 10 n is applied to the object for 1 s and then removed. which of the following is true of the object at time t = 2 s if it is still on the surface? (a) it is at the same position it had at t 0, since a force of 10 n is not large enough to move such a massive object. (b) it is moving with constant nonzero acceleration. (c) it is moving with decreasing acceleration. (d) it is moving at a constant speed (e) it has come to rest some distance away from the position it had att 0.

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 -