/u/NulloK's posts
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If space is expanding, does that mean everything in it, every particle with mass, is expanding ever so little too?
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Raked wingtips on commercial planes improves fuel effiency and takeoff and climb performance. Why doesn't all modern commercial planes have raked wingtips?
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If you have 1 cubic m of air at sea level at average air pressure...How much of that volume is empty space free of any particles of any kind?
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