A scientist places a strip of hot metal on top of a block of another metal with a lower melting point. The second metal quickly melts. What
transfer responsible?
U Convection, because the metals touch and cold from the block moves to the warmer strip of metal, cooling it down
Conduction, because both metals are in the sun and melt as the sun's rays heat them
Convection, because heat from the strip of metal heats the air around it, and then that warm air heats the metal block
Conduction, because the heat energy is absorbed by the metal atoms in the block. Once they have absorbed enough energy, they b

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 -

It should be d if not then c