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AP Physics 2
15.7 Fission, Fusion, and Nuclear Decay
IntermediateMCQGraphicalMathematicalConceptual20.5k
Activity versus time for a sample of a radioactive isotope.
Activity versus time for a sample of a radioactive isotope.
A sample of an unknown radioactive isotope decays over time. The activity \(A\) of the sample as a function of time \(t\) is measured and plotted in the graph shown. Based on the graph, which of the following is the best estimate of the initial number of radioactive nuclei in the sample at \(t = 0\text{ s}\)?

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