A mountain goat was traveling down a hill at 1 m/s and then fell off a cliff and was falling at the acceleration due to gravity 9.8m/s2. What was its final velocity if it fell 54 meters to t 1. A bicyclist accelerates at 0.89 m/s2 during a 5.0-second interval. What is the change in the velocity of the bicyclist and the bicycle?

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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