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MDCAT Physics QUESTION #415
Question 1
A certain radioactive mass decays from 64 gm to 2 gm in 20 days. What is its half-life?
  • 5 days
  • 4 days✔️
  • 10 days
  • 6 days
Correct Answer Explanation
64?32?16?8?4?2 is 5 half-lives in 20 days, so t?/? = 4 days