If the fraction of the atoms of a radioactive material left after 120 years is 1/64, what is the half-life of the material?

Assessment: JAMB UTME - Physics - 2021 Subject: Physics

Question 1 Report

24 years

20 years

10 years

2 years

Answer Details

Given amount remaining = $\frac{1}{64}$

= $\frac{1}{64} = \frac{1}{(2)^{6}}$

$∴$ = $\frac{120 years}{6}$ = 20 years

$\Rightarrow$ T $\frac{1}{2}$ = 20 years

Related Questions

Everything you need to excel in JAMB, WAEC & NECO