2019年春八年级物理下册第九章第2节液体的压强第2课时连通器与液体压强的应用课件新版新人教版20190221424.ppt

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第2节 液体的压强 第2课时 连通器与液体压强的应用,第九章 压强,导入新课,讲授新课,课堂小结,随堂训练,观察与思考右图容器中红色液体是否在同一水平面上,如果是,你能解释其中的原因吗?如果不是,又是为什么呢?,导入新课,1.知道连通器的原理;(难点) 2.了解生活、生产中形形色色的连通器。,学习目标,导入新课,2.连通器的特点:连通器里装同种液体,当液体不流动时,连通器各部分中的液面总是相平的。,1.上端开口、下端连通的容器叫做连通器。,讲授新课,假设容器底部有一竖直膜片,分析图中p1与p2的大小。,如果p1、p2大小不相等,会发生什么现象?,右侧液面下降,最后当液体静止时,两侧液面相平。,讲授新课,3.连通器的应用,水位计,讲授新课,自来水供水系统,讲授新课,讲授新课,船闸是利用连通器原理工作的,讲授新课,课堂小结,连通器与液体压强的应用,定义,特点,茶壶、排水管的U形“反水弯”、锅炉水位计、船闸等。,连通器里装同种液体且不流动时,连通器各部分中的液面总是相平的。,上端开口、下端连通的容器叫做连通器,应用,

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