Physics

Problem

The activity of a freshly prepared sample is

4000\,\text{Bq}

. Its half-life is

2\,\text{h}

. What is its activity after

6\,\text{h}

? a)

1330\,\text{Bq}

1000\,\text{Bq}

500\,\text{Bq}

3180\,\text{Bq}