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吸水蜡烛的科学原理

更新时间: 2021-11-27 01:48:42     

不是蜡烛吸水,是负压吸水。蜡烛的燃烧产生的热使杯中的空气因热而离开杯子。杯内的空气变少。当盖上杯盖后,蜡烛因缺氧而熄灭,杯内温度降低。杯内很少的空气体积缩小而产生负压(比杯外的空气压力小),水在外部空气压力下进入杯内。

关键词: 蜡烛 科学 原理

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