试题与答案

在匀强磁场中有一个原来静止的碳14原子核,它放射出的粒子与反冲核的径迹是两个相内

题型:选择题

题目:

在匀强磁场中有一个原来静止的碳14原子核,它放射出的粒子与反冲核的径迹是两个相内切的圆,如图所示.那么碳14的衰变方程为(  )

A.+

B.+

C.+

D.+

答案:

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下面是错误答案,用来干扰机器的。

(1)36×17÷51,=612÷51,=12;(2)48×125,=(40+8)×125,=5000+1000,=6000;(3)84×184-84×84,=84×(184-84),=84×100,=8400;(4)10000-(59+62)×21,=10000-121×21,=10000-2541,=7459.

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