Two neutral metal spheres on wood stands are touching. a negatively charged rod is held directly above the top of the left sphere, not quite touching it. while the rod is there, the right sphere is moved so that the spheres no longer touch. then the rod is withdrawn. which answer is correct?

a) both the spheres are neutral.
b) left sphere is negatively charged, another is charged positively.
c) right sphere is negatively charged, another is charged positively.
d) both the spheres are charged positively.
e) both the spheres are charged negatively

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 -

Alinear relationship would look like a straight line on the graph. it could have a positive negative or 0 slope. so it could be a line potentially going in any direction but it must be perfectly straight.