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Physics-

General

Easy

Question

If half life of a radioactive element is , after its activity becomes

1/9
1/27
1/6
1/8

The correct answer is: 1/8

By using $A equals A subscript 0 open parentheses 1 half close parentheses to the power of 1 over T subscript 1 divided by 2 end subscript end exponent not stretchy rightwards double arrow A over A subscript 0 equals open parentheses 1 half close parentheses to the power of 9 divided by 3 end exponent equals 1 over 8$

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