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

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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]
If the half-life of pzvs2 ln)4x; ga 7czm0wt5 dks jeq0d. 8material is 45 years, how much will be left after 100 yearsc. qd ztw0e7 sj80dm5k?

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