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Physics · May / June 2025 · Paper 11 · Question 37

5054Half-life

The graph shows the results of an experiment to measure the count rate of a radioactive isotope. What is the half-life of the isotope?

  1. A60 minutes
  2. B80 minutes
  3. C100 minutes
  4. D160 minutes

As printed in the paper

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Correct answer: A. 60 minutes

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