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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."
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圖像加註文字，民主派社運人士郭鳳儀是34名被香港國安警通緝的人士之一。Article InformationAuthor, 郭悠（Koh Ewe）
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