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."
2026-02-28 00:00:00:03014271810http://paper.people.com.cn/rmrb/pc/content/202602/28/content_30142718.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/28/content_30142718.html11921 柬埔寨国王西哈莫尼和太后莫尼列来华
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