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anonymous

  • 5 years ago

suppose a radioactive isotope has a half- life of 82 years. If we currently have 80kg, how much will be left after 25 years?

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  1. anonymous
    • 5 years ago
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    that's chemistry, hmm. is it a first level? second level?

  2. anonymous
    • 5 years ago
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    it second level If you could help me with it thank you very much cause i'm stuck

  3. nowhereman
    • 5 years ago
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    halflife of 82 years, means after \[n \cdot 82\; \text{years}\] there is only an the \[2^n\]'th part left. So after x years there is \[\frac{80\text{kg} }{2^{x/82\;\text{years}}}\] left.

  4. anonymous
    • 5 years ago
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    thank you my teacher told me to put it into the "pert" formula that's why i got confused could you help me put it into "pert" formula???? thanks

  5. nowhereman
    • 5 years ago
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    Sorry, I never heard of such a thing.

  6. anonymous
    • 5 years ago
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    it's okay thank you

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