Half-life and decay constant (id: c3aee2052)

本题目来源于试卷: Half-life and decay constant，类别为 美国物理杯赛(Physics Bowl)

[单选题]
08.47: A radioactive sample delwkrn+ ;aiptk4y19:r )o a rn4cays with a half-ljwuv h -:vccg7ivx);f rh9t5qg7*l u*ife of 2.0 yr. Approximately how much time must pass so tha:g cvg-qu5v l9wx7hrfitc); * hj*vu7t only 1/3 of the original sample remains?

A. 6.0 yr
B. 3.4 yr
C. 3.2 yr
D. 3.0 yr
E. 2. 8 yr


参考答案:  C


本题详细解析: 暂无

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