一张展开的报纸平放在水平桌面上,对桌面的压强为0.5Pa,将这张纸撕去一半,剩余部分对桌面的压强约为多少?
一张展开的报纸平放在水平桌面上,对桌面的压强为0.5Pa,将这张纸撕去一半,剩余部分对桌面的压强约为多少?
物理人气:261 ℃时间:2019-08-19 13:09:04
优质解答
由P=F/S可知F(报纸对桌面的压力即报纸的重力)和S(报纸的面积)同时减少一半,所以P不变.
我来回答
类似推荐
猜你喜欢
- 1what are you going to do tomorrow homework?回答
- 21.learning english seems easy at () ,but it is not really easy if you want to learn it well
- 3在三角形ABC中,角ACB=90度,点D,E分别是AC,AB的中点,点F在BC的延长线上,且角CDF=角A,
- 4已知2i-3是关于x的方程2x²+px+q的一个根,求实数p,q的值
- 53.Tom,with his classmates,often ______ football after school.(play) 句子成分分析
- 6五乘以十的负八次方,等于几
- 7运用文化生活知识分析,国家为什么注重文化软实力
- 8barbara is easy to reognize as she's the only one of the women who ( ) evening dress.
- 9两个木中间加一个矛,下面一个心是什么字?怎么读?
- 10水银温度计能在宇宙飞船里使用吗?