/u/tazack's posts
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If I had a steel tube, say 2" in diameter, vacuum sealed and 30,000' high and dropped a marble down it, would that marble create a huge crater bursting through the bottom into the earth since terminal velocity has been removed?
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[AMA Request] David Paulides, author of *Missing 411* series documenting extremely strange disappearances of hundreds in National Parks
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If the moon is about 1 light second from earth, when we see it, is it 1 second in the past, or is it further back due to the sun's light first having to reach the moon and reflect back to earth?
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