An elevator filled with passengers has a mass of 1.70×103kg . (a) the elevator accelerates upward from rest at a rate of 1.20m/s2 for 1.50 s. calculate the tension in the cable supporting the elevator. (b) the elevator continues upward at constant velocity for 8.50 s. what is the tension in the cable during this time? (c) the elevator decelerates at a rate of 0.600m/s2 for 3.00 s. what is the tension in the cable during deceleration? (d) how high has the elevator moved above its original starting point, and what is its final velocity?

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 -