Answer:
In an air compressor, a rotor spins, causing a piston to move up and down. When the piston goes down, freestanding air is pulled into a chamber. Then, the air is compressed and forced back outward as the piston rises back up.
Explanation:
An accepted and universally true explanation of observed facts is a law.
Explanation:
Formula for energy value is as follows.
E = 
where, 
= 13.6
n = number of shell
So, at ground state energy of hydrogen atom will be as follows.
E =
= 
= -13.6
Hence, for an ionized atom value of energy will be as follows.
E' = 
or, E' = 
Thus, we can conclude that total energy of the remaining electron in the ionized atom is .
In a water molecule, the oxygen atom and hydrogen atoms share electrons in covalent bonds, but the sharing is not equal. In the covalent bond between oxygen and hydrogen, the oxygen atom attracts electrons a bit more strongly than the hydrogen atoms.
<span>The right answer is the option B. Close to 99 percent. The atmosphere is a mixture of gases: nitrogen, oxygen, CO2, H2O, argon, among others. Nitrogen is about 78% and oxygen is about 21%, so they two together constitute about 99 percent of the Earth's atmosphere.</span>
