In the following three arrangements each resistor has the same resistance r. rank the equivalent resistances of the arrangements in descending order (largest first) 15. the peak value of the ac current in a circuit is 6.0 a, and peak value of the ac voltage applied to the circuit is 4.1 v. what is the average power delivered to the circuit? 16. the temperature coefficient of resistivity or a material is 0.0035 (c^o)^-1. by how much at does the temperature of a wire made from this material have to change, in order that the resistance of the wire doubles?

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 -