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WAEC - Physics (2003 - No. 41)
A radioactive element has a decay constant of 0.077s
-1
, calculate its half life
12.5s
9.0s
5.1s
0.5s
Paliwanag
T = \(\frac{0.692}{\lambda} = \frac{0.692}{0.077}\)
= 9s
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