Answer to Question #76811 in Electricity and Magnetism for Deepesh Tripathi

Question #76811
A fraction of atoms of radioactive element that decays in 6 days is 7/8 . The fraction that decays in 10 days will be (a). 77/80. (b) 71/80. (c) 31/32. (d) 15/16
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Expert's answer
2018-05-03T09:10:08-0400
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Comments

Assignment Expert
23.08.18, 18:54

Dear Edward, 7/8 indicates the fraction of decayed elements to the initial number of active elements. But fraction N/N_0 shows the fraction of active elements at the moment t. So we need calculate: (N/N_0)_1 = 1 - 7/8 = 1/8.

Edward
23.08.18, 14:12

In question their is fraction of atom is 7/8 but in answer you are using 1/8 why??

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