How long does it take for 3 * 10 ^ 9 atomic nuclei to disintegrate in a preparation with a constant activity of 15 MBq?

The dependence of the number of decays N over time t on the constant activity of source A has the form of a linear function
N = Аt,
where N is the number of decays in time t,
A is the activity of the source.

Hence t = N / A.
t = (3 * 10 ^ 9) / (15 * 10 ^ 6 Bq) = 200 s;
(1 MBq = 10 ^ 6 Bq).

Answer: 200 p.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.