What forces must be overcome for a substance to melt

If you want to create an electrical current, which situation would produce a solution capable of this

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal