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16.放射性物質衰變至僅剩原來一半量所需時間稱半生期,已知放射性物質的衰 變爲一級反應,其半生期爲定値,與濃度無關。今有一批含某一種放射性之鋼 筋,其中所含放射性物質的半生期爲一年,且衰變後即無放射性
問題詳情
16.放射性物質衰變至僅剩原來一半量所需時間稱半生期,已知放射性物質的衰 變爲一級反應,其半生期爲定値,與濃度無關。今有一批含某一種放射性之鋼 筋,其中所含放射性物質的半生期爲一年,且衰變後即無放射性。則四年後剩餘的放射量爲原有的幾倍?
參考答案
答案:A
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
上一篇 :
【題組】53. (A) commonly-heard (B) commonly-hearing(C) common-heard (D) common-hearing
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※根據華南地區河川的水文特性推測,若在該地區某河川興建水庫,則水庫下游水文測站觀測的水位變化曲線,會產生顯著差異。下圖中的兩條曲線分別表示該水文測站在水庫完成前後的水位變化。請回答下列問題:【題組】4
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