What is the halflife of a sample of radioactive substance fo
What is the half-life of a sample of radioactive substance for which 2/3
the original amount remains after 10 years?
the original amount remains after 10 years?
Solution
2/3 = (1/2)^n
n = ln(2/3) / ln(1/2) = 0.58496250072115
no of half lives = 0.58496250072115
10/0.58496250072115= hlf life
17.09511291351472841835

