23. The Geiger counter mounted near the preparation of a radioactive isotope of silver, registers the flow of β-particles. The first measurement of the flow of particles is equal to F1 87 s-1, and after a time t = 1 day flow F2 was found to be 22 to 1. To determine the half-life T1 / 2 isotope.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)