Answer:
The answer is A. a wave of vibrating electric and magnetic energy.
Answer:
Synthetic detergents can be used for washing purposes even when the water is hard, whereas soaps are not suitable for washing with hard water. This is because of the fact that synthetic detergents can lather with hard water. Hence, Synthetic detergents better than soaps.
The heat of fusion for water is the amount of energy needed for water to :
c.melt
Answer:
the oxidation number of those elements is 2 because some of them are molecules
