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alexandr402 [8]
3 years ago
6

If the half- life of a sample of a radioactive substance is 30 seconds, how much would be left after 60 seconds ?

Physics
1 answer:
n200080 [17]3 years ago
5 0
After 30 seconds half is left.  After 30 more seconds, half of that much will be left (25%) or 1/4 of the original amount
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