Neco Model Questions Vol1 2021 Physics Question 39
Practice objective / multiple choice question 39 from the 2021 Neco Model Questions Vol1 Physics examination.
A radioactive isotope X decays by \(\beta\)-emission with a half‑life of \(8\ \text{min}\). Initially the sample contains \(2.0\times10^{6}\) atoms of X. After some time the measured activity is \(2500\ \text{Bq}\). Assuming no other processes, calculate the elapsed time (in seconds) since the start of the observation. Give your answer to the nearest second.
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About This Question
This is Neco Model Questions Vol1 2021 Physics Question 39. It is one of the objective questions from the 2021 Neco Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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