Galaxy a is located 200 million light-years from earth, while galaxy b is located 600 million light-years from earth. according to the hubble law, how does the motion of the two galaxies compare?
a. galaxies a and b are moving away from earth at the same rate.
b. galaxy a is moving away from earth three times as fast as galaxy b.
c. galaxy b is moving away from earth three times as fast as galaxy a.

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 -

If your workout exceeds an hour you should substitute "a sports drink" for water.hope my answer has you : )