Nuclear Physics and RadioactivityMedium
Question
A mixture consists of two radioactive materials A1 and A2 with half lives of 20 s and 10 s respectively.Initially the mixture has 40 g of A1 and 160 g of A2. The amount of the two in the mixture will becomeequal after
Options
A.40 s
B.60 s
C.80 s
D.20 s
Solution
40 → 20 → 10
160 → 80 → 40 → 10
t = 40 sec.
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