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To determine the half-life of a substance from a graph, locate the point where the substance's concentration is half of its initial value. Then, find the time it took for the substance to reach that concentration. This time interval is the half-life of the substance.

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5mo ago

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How do you determine the half life of a radioactive substance that has changed through radioactive decay After 40 days the original substance left is is one sixteenth of the original amount?

To determine the half-life of the substance, you can use the fact that after one half-life, the substance will be reduced to half of its original amount. In this case, after 40 days, the substance is reduced to one sixteenth of its original amount, which represents 4 half-lives (since 1/2^4 = 1/16). Thus, each half-life of this substance is 10 days.


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