题目内容
下图为两分子系统的势能Ep与两分子间距离
的关系曲线。说法正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241340030431834.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134002996260.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241340030431834.jpg)
A.当![]() |
B.当![]() |
C.当![]() |
D.当![]() |
BC
分子间距离等于r2时分子引力等于斥力,距离增大时,分子力表现为引力,引力做正功,引力势能增大,距离减小时分子力表现为斥力,分子势能随着距离的减小而增大,所以在r2时分子势能最小,BC对;
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目