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压强计测压强的工作原理

更新时间: 2020-10-08 00:00:00     

在U形管内装有色液体,两侧液面都受大气压强的作用,两侧液面在同一高度。用橡皮管把扎有橡皮膜的金属盒连到U形管一侧,用手指按橡皮膜,手指加在橡皮膜上的压强就由封闭在管内的气体根据帕斯卡定律来传递这个压强,而使左侧液面降低,右侧液面升高,U形管两侧液面出现高度差。手按橡皮膜压强越大,液面高度差也越大。

关键词: 压强 工作 原理

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