/u/graaahh's posts in /r/askscience
How many moons does the Earth currently have, if any naturally formed body in orbit is considered a moon?
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If quarks don't exist independently outside of larger particles, and can't be forcibly separated, how can we identify and study them as discrete objects?
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In fiction, people can just wear heavy weights while training to get stronger and faster than humans normally could. What limits does the human body have that make this impossible in real life?
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How can a thing be a "wave" instead of a particle, or "be a wave" at all? Isn't a wave just a kind of motion things with particles can exhibit?
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If a perpetual motion machine were inside a temperature-sealed room, would it slowly cool down the room, heat it up, or neither?
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