A substance has half of 3 min. After 6 min, the count rate was observed
PHYSICS
JAMB 2020
A substance has half of 3 min. After 6 min, the count rate was observed to be 400. What was its count rate at zero time?
- A. 1600
- B. 1200
- C. 200
- D. 2400
Correct Answer: A. 1600
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