Answer to Question #193054 in Physics for Finn Marmot

Question

A radioactive source contains two different isotopes. One isotope decays by emission of an alpha particle with a half-life of 4 days while the second isotope emits beta particles with a half-life of 3 days. The initial activity of the source is 176 Bq, which reduces to 80 Bq when a piece of tissue paper is placed between the source and the detector. Calculate the activity of the source after 12 days when the tissue paper is removed. 

Answer 1

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