When a hot piece of iron is placed in cool water,
 the temperature of the iron decreases and the
 temperature of the water increases. Why does this
 happen?
 A Heat always flows from hot objects to cold
 objects.
 B Heat alwaystilows from solids to liquids.
 C Iron is a poor thermal conductor.
 D Potential energy is converted into kinetic
 energy
 PLEASE ASAP