JAMB - Physics (2009 - No. 31) | ExamPlay

JAMB - Physics (2009 - No. 31)

If the decay constant of a radioactive substance is 0.231s-\(^1\), the half-life is?

3.00 s

0.12 s

0.33 s

1.50 s

Vysvětlení

Half-life, T (1)/2 = (0.693)/∆ = (0.693)/ 0.231 = 3.0sec

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