A seesaw has an irregularly distributed mass of 50 kg, a length of 3.0 m, and a fulcrum beneath its midpoint. It is balanced when a 60-kg person sits on one end and a 90-kg person sits on the other end. a. Find the position of the center of mass of the seesaw relalive to the fulcrum Express your answer with the appropriate units. Enter negative value if the center of mass is located closer to the 60-kg person and positive value if the center of mass is located closer to the 90-kg person
b. Find the position ot the center of mass ot the system relative to the seesaw'a midpoint Express your answer with the appropriate units. Enter neqative value if the center of mass is located closer to the 60-kE person and positive value if the located eloser to the 90-k person.

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 -