Question

Cindy's club dues for last week was 255 ¢. Cindy paid with a $5 note. How much change did she receive?

Answer 1

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. ... The only way to use energy is to transform energy from one form to another