作者yanbighead (yan)
看板Physics
标题[题目] 放射线问题
时间Sun Mar 8 23:40:50 2009
问题如下
how many atoms are in a radioactive sample with activity 12Bq and half life
15 days??
12Bq => 每一放射线元素单位时间得活动量
The number of decays per unit time is the activity of a radioactive
sample;the SI unit of activity is the becqueral(Bq)
请大家帮忙一下 感恩~~
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※ 编辑: yanbighead 来自: 163.23.231.88 (03/08 23:53)