phyics

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Tritium (half-life = 12.3 y) is used to verify the age of expensive brandies. If an old brandy contains only the following fraction of the tritium present in new brandy, how long ago was it produced?
1/16

  • phyics -

    (1/2)^x=1/16

    12.3x=?

  • phyics -

    i don't think it 4

  • phyics -

    x=4

    12.3(4)=?

  • phyics -

    1/16 = (1/2)^4 so four half lives
    4 * 12.3 as TutorCat said

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