Aboat is moving due east in a region where the earth's magnetic field is 5.0 × 10^5n/am due north and horizontal. the boat carries a vertical aerial 3m long. if the speed of the boat is 2.50 m/s, what is the magnitude of the induced emf in the wire of aerial?
a. 3.75 × 10^-4 v
b. 3.75 × 10^-4 mv
c. 375 × 10^-4 v
d. 1 mv
e. none of the above

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 -