Physics Unit30: Nuclear Physics and Radioactivity (id: c0438e3c5)

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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]
A radioactive substance with a half-liuy)z4znc(vcrv-n0g ).ts6z b2bj 9h cfe .lstu(z t+d7j r.e jn6of 3.0 days has an initial activity of 7+u.( ttde zsr6njj .l$0.24 \; Ci$. What is its activity after 6.0 days?

A. $0.12 \; Ci$
B. $0.48 \; Ci$
C. $0.06 \; Ci$
D. none of the given answers


参考答案:  C


本题详细解析: 暂无