Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

The graph illustrates how the decay rate of a radioactive source varies over time. What is the decay rate at $8$ days?

  • A$0\,\text{decays} / \text{s}$
  • B$125\,\text{decays} / \text{s}$
  • C$250\,\text{decays} / \text{s}$
  • D$500\,\text{decays} / \text{s}$

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