Of the following machines, which is not related to the others?

ramp

screw

lever

Answer;

Lever

Explanation;The two basic families of simple machines are the lever family and the inclined plane family. The lever family includes; the simple lever, the pulley and the wheel and axle while the inclined plane family includes; the simple inclined plane, the wedge and the screw.Ramps are among examples of inclined planes, together with others such as sloped roads and hills,  plows, wedges, hatchets, etc.Therefore, ramps and screw are related as they are examples of machines in inclined plane family.

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 -

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