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Two radioactive sources A and B initially contain equal number of radioactive atoms. Source A has a half life of one hour and source B two hours. At the end of two hours, the ratio of the rate of disintegration of A to that of B will be

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Two radioactive sources A and B initially contain equal number of radioactive atoms. Source A has a half life of one hour and source B two hours. At the end of two hours, the ratio of the rate of disintegration of A to that of B will be






 
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