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robin. on Twitter: "I've just been reading about this Physics puzzle from the '60s. Quite baffling at first, if you haven't seen it before! Why, when the tube is inverted, is there
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robin. on Twitter: "I've just been reading about this Physics puzzle from the '60s. Quite baffling at first, if you haven't seen it before! Why, when the tube is inverted, is there
moral-turtle525: A beautiful hourglass, pouring fine crystallized sand, around musical notes, stars, moons, seagulls, fireflies, cobalt blue starry sky with half moon in the background
This Video Explains The Hour Glass Buoyancy Problem
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