Physics

Problem

A radioactive source contains

0.50\,\mu\text{g}

of isotope P (mass number

50

T_{1/2}=1.5\,\text{h}

) and

0.50\,\mu\text{g}

of isotope Q (mass number

100

T_{1/2}=3.0\,\text{h}

). Both isotopes are pure and non-interacting. What is the approximate ratio of the total activity at

t=0

to the total activity at

t=6.0\,\text{h}

? a)

8:1

4:1

10:1

16:1