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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