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A radioactive sample is 555 years old. It’s half life is 111 years. How many half lives?
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A radioactive sample is 555 years old. It’s half life is 111 years. How many half lives?
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May 9, 2019
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A radioactive sample is 555 years old. It’s half life is 111 years. How many half lives?
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Amanda Mitchell
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we are going to use the half-life formula:
the no. of half-lives = the total time/time for one half-life
when the total time = 555 years
and the time for one half-life = 111 years
so by substitution:
∴ no. of half-lives = 555 / 111
= 5
Adriel
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May 13, 2019
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Adriel
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