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RE: QUIZ Test #17- can you solve this? difficulty level: HARD
They're all the same volume, but one has a different mass (and they're all heavier than air)? Then you just need to measure density. Roll them down a slanted board. The one that reaches the bottom of the board at a different time is heavier/lighter. This experiment is not possible in a vacuum. Are we on the moon? I had 3 chances to weigh the balls and I needed 0. Do I get bonus points?