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."
'The finest in the world': Why the US is buying icebreakers from Finland。业内人士推荐同城约会作为进阶阅读
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Anthropic to Pentagon: Autonomous weapons could hurt US troops and civilians
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