number of nuclei of both are equal. The ratio N1/N2 will be equal to :

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Two radioactive substances X and Y originally have N1 and N2 nuclei respectively. Half life of X is half of the half life of Y. After three half lives of Y, number of nuclei of both are equal. The ratio N1/N2 will be equal to :
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Sep
Two radioactive substances X and Y originally have N1 and N2 nuclei respectively. Half life of X is half of the half life of Y. After three half lives of Y, number of nuclei of both are equal. The ratio N1/N2 will be equal to : number of nuclei of both are equal. The ratio [...]
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