A) \[1:9\]
B) \[1:16\]
C) \[6m/s\]
D) \[4m/s\]
Correct Answer: C
Solution :
\[\frac{dN}{dt}=-\lambda N\] \[\Rightarrow \] \[n=-\lambda N\] \[\lambda =-\frac{n}{N}\] \[\therefore \] Half-life \[=\frac{0.693}{n}s\]
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