本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity,类别为 Generic Physics
[单选题]
How long will it take a,j 75-ookgy op 7t;i cz0c6 tuc$4.5 \; Ci$ sample of material to reach an activity level of $0.14 \; Ci$ if the half-life is 435 years?
A. $14,478 \; years$
B. $3245 \; years$
C. $2178 \; years$
D. $1993 \; years$
参考答案: C
本题详细解析:
暂无
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