A radioactive element has a decay constant of 0... - WAEC Physics 2008 Question
A radioactive element has a decay constant of 0.077s-1. Calculate its half-life
A
13.0s
B
9.0s
C
5.1s
D
0.5s
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Correct Option: B
(t_{\frac{1}{2}} = \frac{0.693}{\lambda} = \frac{0.693}{0.077} = 9s)
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