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The whip crack is a sonic boom [Random Knowledge #41]
posted April 10 2013 22:16.56 by Giorgos Lazaridis




Whips make this distinctive "crack" when moved rapidly (you know the move, you know the crack). This crack is actually a sonic boom, for the tip of the whip breaks the speed of sound! The following video shows this sonic boom with the help of a high speed camera!


 
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