A substance has a half of 3mins. after 6mins. the count rate was observed to...
PHYSICS
JAMB 1990
A substance has a half of 3mins. after 6mins. the count rate was observed to be 400. What was its count rate at zero time?
- A. 200
- B. 1200
- C. 1600
- D. 2400
Correct Answer: C. 1600
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