题目内容
如图所示,粗细均匀竖直放置的U形玻璃管左上端封闭,右上端开口。当温度为
时,管内用水银封闭着长L1=8cm的空气柱,这时两管内水银面等高,已知大气压强为
cmHg。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241147108373180.gif)
(1)温度T2多高时,被封闭的气柱长变为L2=8.5cm?
(2)保持温度t2不变,从开口端再注入多高的水银柱,气柱长可变回8cm?
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114710774420.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114710790386.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241147108373180.gif)
(1)温度T2多高时,被封闭的气柱长变为L2=8.5cm?
(2)保持温度t2不变,从开口端再注入多高的水银柱,气柱长可变回8cm?
(1) 323k (2) 5.75cm
(1)
(2分),
(2分,)
k(1分)
(2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241147109301099.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114710884588.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114710899918.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824114710915301.gif)
(2)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241147109301099.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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