We're all familiar with the high-pitched squeak of basketball shoes on the court during games, or tires squealing on pavement. Scientists conducted several experiments and discovered that the geometry of the sneakers' tread patterns determines the squeak's frequency, enabling the team to make rubber blocks set to specific frequencies and slide them across glass surfaces to play Star Wars' "Imperial March."
Дональд ТрампПрезидент США，推荐阅读夫子获取更多信息
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Haise and Lovell worked frantically to boot up the lunar module, Aquarius.