AP Physics 2
15.7 Fission, Fusion, and Nuclear Decay
Two radioactive samples, Sample X and Sample Y, initially contain equal numbers \(N_0\) of undecayed nuclei at time \(t = 0\). The half-life of Sample X is \(4.0\text{ hours}\), and the half-life of Sample Y is \(2.0\text{ hours}\). Which of the following correctly compares the activity \(A_X\) of Sample X to the activity \(A_Y\) of Sample Y at time \(t = 8.0\text{ hours}\), with proper justification?
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