Physics Unit30: Nuclear Physics and Radioactivity (id: 041669688)

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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 sample haa i72c4 tt:pk(qkxjvjfyf( h p4mz-cn8f1h( :s a half-life of 10 min. zm98 4t 3draaoh2nj8d+ba(r z What fraction of the sample is left afrrjhmad8 ot (dzaz3a b82+n49 ter 40 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