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Normal 0false false falseEN-US X-NONE X-NONE/* Style Definitions */table.MsoNormalTable{mso-style-name:Table Normal;mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-parent:;mso-padding-alt:0in 5.4pt 0in 5.4pt;mso-para-margin-top:0in;mso-para-margin-right:0in;mso-para-margin-bottom:10.0pt;mso-para-margin-left:0in;line-height:115%;mso-pagination:widow-orphan;font-size:11.0pt;font-family:Calibri,sans-serif;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Times New Roman;mso-bidi-theme-font:minor-bidi;}A radioactive sample with a half life of 1 month has the label: Activity = 2 micro curies on 1-8-1991. What would be its activity two months earlier?(a) 1. 0 micro curie(b) 0.5 micro curie(c) 4 micro curie(d) 8 micro curie

Simran Bhatia , 11 Years ago
Grade 11
anser 1 Answers
Amit Saxena

Last Activity: 11 Years ago

(d)

In two half lives, the activity becomes one fourth.

Activity on 1-8-91 was 2 micro-curie

.''. Activity before two month''s,

4 × 2 micro-curie = 8 micro curie

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