An elevator carrying a person of mass m is
moving upward and slowing down. how does the
magnitude of the force exerted on the person
by the elevator floor compare with the magnitude
mg of the gravitational force?
(a) fang
(d) f can be greater than or less than mg.
depending on the speed of the elevator,

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 -

The independent variable in this experiment is the angle at which the light from the ray box strikes the mirror.hope this .

Amicroscope, because these cells are so small that you would not be able to see them, or what they attack without it.