WAEC - Physics (2003 - No. 41) | ExamPlay

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

解释

T = \(\frac{0.692}{\lambda} = \frac{0.692}{0.077}\)

= 9s

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