E2 = m2c4
E2 = 1/4 m2v4
E2 = (GMm)2/r2
The answer to this question is that the oxidation number for the 2nd energy level is +2. This is because the 2nd energy level is the second highest energy level in an atom, and thus has a higher oxidation number than the 1st energy level. The oxidation number for the 2nd energy level is determined by the number of electrons in the 2nd energy level.
-2 to the second power is (-2) x (-2) = +4
2 to the 2nd power is 4.
2-2 = 4
22x52x7 4x25x7 100x7 700
If you have 3 to the power 2 to the power 2, without any parentheses, you have to calculate from right to left. In this case, calculate 2 to the power 2; then calculate 3 to the power (whatever the result you get). If there are parentheses, do the calculation in parentheses first.
(-2)^2 = -2 * -2 = 4.
hydro power, solar power
4
22 = 4
5
2^5 = 32 and 5^2 = 25