The activity of a sample falls from A₀ to A₀/√3 in one hour. What will its activity be after 3 more hours?
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Question

The activity of a sample falls from A₀ to A₀/√3 in one hour. What will its activity be after 3 more hours?

G1 Physics · Accepted Answer

In one hour A/A₀=1/√3. After four total hours, A/A₀=(1/√3)⁴=1/9. Thus A=A₀/9. Correct answer: B.