题目内容
卢瑟福用α粒子轰击氮原子核,产生了氧的一种同位素和一个质子。其核反应程为
。在些反应室内有“α粒子、氮原子核、质子、氧的同位素”共存,它们间常发生碰撞。设有速度为v的氮核与静止的质子发生弹性正碰,求碰撞后两个粒子的速度。已知氮核的质量mN质子的质量mH(只要求写出方程或方程组即可,不要求解方程)。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134110092981.png)
mNv = mNvN + mHvH .
mNv2 =
mNvN2 +
mHvH2
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134110138319.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134110138319.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134110138319.png)
在碰撞前后动量守恒,机械能守恒
mNv = mNvN + mHvH .
mNv2 =
mNvN2 +
mHvH2
mNv = mNvN + mHvH .
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134110138319.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134110138319.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824134110138319.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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