[HN Gopher] A collector of math and physics surprises (2018)
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       A collector of math and physics surprises (2018)
        
       Author : ulrischa
       Score  : 27 points
       Date   : 2024-01-14 07:34 UTC (15 hours ago)
        
 (HTM) web link (www.quantamagazine.org)
 (TXT) w3m dump (www.quantamagazine.org)
        
       | Jun8 wrote:
       | Here's one nice such surprise to amaze any kid (or a date, if
       | they're of the right mold): get a stick or a uniform stick,
       | balance it on your index fingers by placing them randomly along
       | the length. Then start moving your fingers together. They'll
       | always meet at the center (center of mass)! Your fingers take
       | turns moving as if by magic. Your audience will first think that
       | you're purposefully moving them, so next let them do it.
        
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       (page generated 2024-01-14 23:00 UTC)