题目内容
一根两端封闭粗细均匀的直玻璃中有一段长57厘米的水银柱,在水银柱两边各有一段空气柱(如图)。当玻璃管水平放置,两段空气柱长度均为30厘米,压强都是一个标准大气压,现将玻璃管缓慢竖立起来,则上下两段空气柱的长度分别为( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241747238176735.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241747238176735.png)
A.30厘米,30厘米 |
B.35厘米,25厘米 |
C.40厘米,20厘米 |
D.45厘米,15厘米 |
C
试题分析:设左侧气体参数为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174724035337.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174724394576.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174724721368.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174724940596.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174725205656.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174725470683.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174725720617.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174725985829.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174726235885.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174726500910.png)
点评:考察学生应用理想气体状态方程,其中注意
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174726750733.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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