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Questions  >>  EAMCET  >>  Physics
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A radioactive substance has density ρ , volume V, and decay constant λ. If the molecular weight of the substance is M, and Avogadro number is Na then the radioactivity of the substance after time 't' is

(1)(λVρNaM)(1eλt)(2)(tNaVρM)eλt2(3)λNaVρMeλt(4)λVρNaeλtM

 

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