The slotted arm revolves in the horizontal plane about the fixed vertical axis through point o. the 2.5-lb slider c is drawn toward o at the constant rate of 2.7 in./sec by pulling the cord s. at the instant for which r = 7.9 in., the arm has a counterclockwise angular velocity ω = 5.5 rad/sec and is slowing down at the rate of 2.4 rad/sec2. for this instant, determine the tension t in the cord and the force n exerted on the slider by the sides of the smooth radial slot. the force n is positive if side a contacts the slider, negative if side b contacts the slider.

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 -

Clike bone scan for find heart