Do pop cans weigh more crushed?
No. In a perfect environment, they would weigh slightly less, since all the air is removed from them. but the amount is so tiny as to be almost unoticeable. However, crushed cans take up less space than uncrushed cans, so you can fit more crushed cans into a given space. so a “cubic foot” crushed cans would weight more than a “cubic foot” of uncrushed cans since there would be more cans in teh “cubic foot”. BTW Gergley — You cannot create or destroy ENERGY. We create and destroy (especially destroy) matter all the time — like a cigarette or coal in a furnace.