Physics Unit30: Nuclear Physics and Radioactivity (id: f1ef71e79)

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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 takig6y.hz,n)34 t +v azhbnpu3 qe a ibrfudz)hi1) 2 x ;z:v$4.5 \; Ci$ 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