Yes. They are called compound machines because two or more simple machines were combined to create it.
Atomic number = 18 (Number of protons)
Mass number = 18 + 20 (Number of protons + neutrons)
There is enough wind power in the U.S. to drive the entire country, but aesthetic considerations cause some people to oppose its use.
1 mol of carbon 12 would possess 6.02 X 10^23 carbon atoms.
