00:01
So in this question, it's asking to take a look at what the idea of half -life is and how long would it take it to get to 1 % of its original mass.
00:09
So there's a lot going on in this question.
00:12
And it's somewhat of a simpler question than we first think.
00:15
So every time the half -life turns over, the sample amount is half of what originally was.
00:20
So in one half -life, we have 50 % of the sample.
00:24
Another half -life, we have 25 % of the sample.
00:27
In another half -life, we have 12 .5 % of the sample.
00:30
In another half -life, it's 6 .25 % of the sample.
00:34
So again, in another half -life, it's going to turn over again and be 3 .125 % of its half -life.
00:44
Again, another turnover, and we get 1 .5625 % of the sample...