Physics Unit30: Nuclear Physics and Radioactivity (id: 39d5ce624)

admin · Post time 2024-1-22 01:01:29

本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity，类别为 Generic Physics

[单选题]
If the half-life of a-; 1v ;hqa-0 bwrn:ls 9dxfeeq m vq(iqo*nq 7b,aterial is 45 years, how much will be left after 100 yearo (n qi,qvb7q*s?

A. more than 1/2
B. less than 1/2
C. more than 1/4
D. less than 1/4

参考答案: D

本题详细解析: 暂无

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