A 280 day old radioactive substance shows an activity of 6000 dps 140 days later its…
Physics · Class 12 · CBSE — Nuclei
A 280 day old radioactive substance shows an activity of 6000 dps 140 days later its activity becomes 3000 dps. What was its initial activity?
- 20000 dps
- 24000 dps
- 12000 dps
- 6000 dps
Answer
(B) 24000 dps
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