试题与答案

两个完全相同的容器中,分别盛有甲、乙两种液体,将完全相同的两个小球分别放入容器中

题型:选择题

题目:

两个完全相同的容器中,分别盛有甲、乙两种液体,将完全相同的两个小球分别放入容器中,当两球静止时,液面相平,球所处的位置如图所示,甲、乙两种液体对容器底的压强大小分别为P、P,则它们的关系是(  )

A.P>P

B.P<P

C.P=P

D.无法确定

答案:

完全相同的两个小球放入两容器中,当两球静止时,甲图小球漂在表面上,说明甲的密度大于小球的密度;

而乙图的小球在水中悬浮,所以乙的密度等于小球的密度,故甲的密度大于乙的密度;

根据公式p=ρgh可知,深度相同时,甲的密度大于乙的密度,则甲液体对容器底的压强大,即A选项符合题意,B、C、D选项不符合题意.

故选A.

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