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]
10.44: A radioactive 9y9knf1c 8 o i/rahg(8cif3nysample of gas has a half-lifel57yjil ;g ti . mq,rvi aavl)+ydm)0, of 100 seconds. If there are initially 10000 of these gas molecules in a closed container, approximately how many of the molecules remain after a time of 250 a7 vrjymg, i5m,q)yd+t0v );aill .il seconds elapses?
A. 2500
B. 2190
C. 1770
D. 1560
E. 1250
参考答案: C
本题详细解析:
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