Physics

Physics

Problem

A pure sample of

^{60}\text{Co}

has an initial activity of

5.0\,\text{kBq}

. The half-life of

^{60}\text{Co}

is

5.3\,\text{years}

. What will be the activity of the sample after

15.9\,\text{years}

? a)

1.25\,\text{kBq}

b)

0.25\,\text{kBq}

c)

0.63\,\text{kBq}

d)

0.83\,\text{kBq}

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