2023
Physics
POST UTME
4g of a radioactive material of half-life 10 days is spilled on a laboratory floor. How long would it take to disintegrate 3.5 g of material?
A.
1 ¼ days
B.
8¾ days
C.
30 days
D.
80 days
Correct Answer: 30 days
Explanation
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