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JAMB Physics 2023 Paper

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Question : 9

Total: 65

The half life of a radioactive material is 12 days. Calculate the decay constant.

0.8663 $\text{day}^{-1}$
0.04331 $\text{day}^{-1}$
0.17325 $\text{day}^{-1}$
0.05775 $\text{day}^{-1}$

Solution:

$T_{\frac{1}{2}}$ = 12 days ;V=?

$T_{\frac{1}{2}}$ = $\frac{0.693}{\gamma}$

⇒γ ⇒

\frac{0.693}{t_{\frac{1}{2}}}

⇒γ = $\frac{0.693}{12}$

⇒γ= 0.05775

\text{day}^{-1}

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