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anonymous

  • one year ago

A radioactive isotope has a half-life of one week. How much of it will remain after one month? Show all calculations leading to an answer OR explain your answer with 3 – 4 complete sentences.

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  1. anonymous
    • one year ago
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    @hugekabab

  2. anonymous
    • one year ago
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    ooo half life ... its been a while since i did these ... let me think

  3. anonymous
    • one year ago
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    ok

  4. anonymous
    • one year ago
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    ok listen closely

  5. anonymous
    • one year ago
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    assume that the isotope starts at x units

  6. anonymous
    • one year ago
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    . after 1 week half will be gone, or x/2, after the second week half of what remains will be gone. x/2 /2 or x/4, after three weeks x/8 and after 4 weeks, x/16 or 1/16 of the starting amount

  7. anonymous
    • one year ago
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    get it ?

  8. anonymous
    • one year ago
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    yes i kinda already understood half life basically each weach this isotope will loose half of it total life left

  9. anonymous
    • one year ago
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    yup

  10. anonymous
    • one year ago
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    btw i gotta ask ... is this for hig school ?

  11. anonymous
    • one year ago
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    so W1=1/2 W4=1/16

  12. anonymous
    • one year ago
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    so at 1 month it will have 1/16 of its life

  13. anonymous
    • one year ago
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    thats what i think

  14. anonymous
    • one year ago
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    ok thank you

  15. anonymous
    • one year ago
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    half of the orignal in the first week ... half of the half left in the second week (quater of the orignal) and so on

  16. anonymous
    • one year ago
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    get the sequence ?

  17. anonymous
    • one year ago
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    and just to clarify on the last question we did i divided those numbers and got 60041537135.7 and i add KG-J

  18. anonymous
    • one year ago
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    yes i got it thank you so much

  19. anonymous
    • one year ago
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    just kg .... cause its just simple mass ... nothing more ..and btw ... do the math again just to be sure yu have the figures right ..

  20. anonymous
    • one year ago
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    i was kinda hoping for a medal ...its like my first time here on open study ... and damn is this place cool

  21. anonymous
    • one year ago
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    i literally divided the two as is

  22. anonymous
    • one year ago
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    yeah yu did multiply it by C right ? the speed of light

  23. anonymous
    • one year ago
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    yu did right ... as long as you multiplied C as well

  24. anonymous
    • one year ago
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    no i divided m=e/c^2

  25. anonymous
    • one year ago
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    yeah divide ...sorry my bad

  26. anonymous
    • one year ago
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    its correct thrn

  27. anonymous
    • one year ago
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    then *

  28. anonymous
    • one year ago
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    C must be in m/s

  29. anonymous
    • one year ago
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    and what about the ^2 over c? is that encompassed in the number i used for the speed of light

  30. anonymous
    • one year ago
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    yes .. thats the speed of light squared

  31. anonymous
    • one year ago
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    ok

  32. anonymous
    • one year ago
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    well thank you than

  33. anonymous
    • one year ago
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    no problem ... always happy to help ..

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