The activity of a freshly prepared sample is

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

4000\,\text{Bq}

. Its half-life is

2\,\text{h}

. What is its activity after

6\,\text{h}

? (a)

1330\,\text{Bq}

(b)

1000\,\text{Bq}

(c)

500\,\text{Bq}

(d)

3180\,\text{Bq}