How Do You Determine The Half Life Of Something...

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How do you determine the half life of something if you only have the constant (k)

 

Answer No.1

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Here's how: The formula for exponential decay is: P = nekt or P/n = ekt Where n is the amount you started with, P is the amount you endedwith, and t is time For a half-life, however, since P = (1/2)n P/n = 1/2 Thus you have 1/2 = ekt ln(1/2) = kt t = ln(1/2)/k Hope this helps!

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