3
Answershow to find out the sample left over after 25 years??
Answers
Half life is the time taken for one half of the substance to disintegrate. Since Tritium has a half life of 12.5 years, the fraction of Tritium that would be left over after 12.5 years is 1/2. Since 25 is equal to two half lives, the fraction that would be left over after 25 years is half of 1/2, i.e., 1/4.
over 10 years ago
Ramesh kri...
the formula is (1/2)power n where n is the number of half life .in the above case the n is 2 so the answer will be 1/4
about 11 years ago
Guest
It is simple
There is a formula N/No=(1/2)^n,Where n is the number of half lives/
Now to get n;
n=25/12.5=2
Therefore fraction decayed is
N/No=(1/2)^2
=1/4
over 11 years ago
Muthu
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