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古人为什么用木头旋转来起火
更新时间: 2020-09-27 00:00:00  

钻木取火,木头之间旋转时,可以摩擦生热。摩擦力会做功,产生热量,而热量在一定时间内如果没有被散发出去,就会造成温度升高,达到木头的燃点后木头就会燃烧。

钻木取火的发明来源于中国古代的神话传说,是用硬木棒对着木头摩擦或钻进去,靠摩擦取火。

关键词: 古人 为什么 木头 旋转 起火

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