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half life refers to the time it takes for a substance to decay by one-half of its initial amount. Half life and its equation are used to determine how old a substance is, the initial amount of a substance, or the final amount of a substance after a period of time
In addition, half life is often used for carbon dating of samples, for example fossils, to determine from the amount of decay the sample has undergone. There is no normal life because that would imply that it is the time it takes for the entire sample to decay.
Linh Vo 2J wrote:When we talk about half-life, does this imply that there is normal life? I'm confused about what half-life is and when we would want to calculate it?
Half-life is defined as the time taken for the radioactivity of a specified isotope to fall to half its original value.
Simply put, it's the time taken for half of our sample to decay. ( when x goes to x/2)
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