Physics
One nanometer is equal to ________ meters.

10 raised to the power (-3)
10 raised to the power (-12)
10 raised to the power (-9)
10 raised to the power (-6)

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Physics
Conservation of energy refers to the fact that

If you conserve energy you will not be as tired
No chemical reaction is 100 percent efficient
The entropy of the universe is always increasing
Energy cannot be created or destroyed but can be converted from one form to another

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