Waec Model Questions Vol1 2021 Physics Question 47
Practice objective / multiple choice question 47 from the 2021 Waec Model Questions Vol1 Physics examination.
A sample contains two radioactive isotopes of the same element: isotope A with half‑life 10 min and isotope B with half‑life 30 min. At time t = 0 the activities of the two isotopes are equal. After 20 min the total activity of the sample is observed to be 1.5 times the activity of isotope A alone at that instant. Determine the ratio of the initial number of atoms of isotope A to that of isotope B. Give your answer to two decimal places.
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About This Question
This is Waec Model Questions Vol1 2021 Physics Question 47. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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