Physics-
General
Easy
Question
A radioactive sample at any instant has its disintegration rate 5000 disintegrations per minute. After 5 min, the rate is 1250 disintegrations per min. Then, the decay constant (per minute) is
- 0.4 In 2
- 0.2 In 2
- 0.1 In 2
- 0.8 In 2
The correct answer is: 0.4 In 2
Given 
Where 
is decay constant per min
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