A bone is found in your back yard. You decide to date it and discover it...

Question

Question

A bone is found in your back yard. You decide to d

Answer 1

Answer #1

Let z be the age of the bone

1Bq=60 disintegrations per minute

Then 0.097Bq=5.82 disintegrations per minute

And 0.23Bq=13.8 disintegrations per minute

(5.82/13.8)=(1/2)^(z/5730
) (the half life for carbon -14 is 5.73x10³)

log(5.82/13.8)=(z/5730)log(1/2)

(log(0.42)/log(0.5))=(z/5730)

1.25x5730=z

z=7171 years

Answer 2

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