Physics Unit30: Nuclear Physics and Radioactivity (id: 19ea865bc)

本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity，类别为 国际高中通用物理

[单选题]
A radioactive sample has a hauxzti;x-s4. zlf-life of 10 mi fcpaqh+a) jcd*.(p+ as2)mmin. What fraction of the sample is left after 40 +)dmh )s(2cfaa*caq ip+ m.pj min?

A. 1/2
B. 1/4
C. 1/8
D. 1/16


参考答案:  D


本题详细解析: 暂无

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