If a live log contains 200g of carbon-14, how old is buried long that contains 12.5g of carbon-14?

Question

If a live log contains 200g of carbon-14, how old is buried long that contains 12.5g of carbon-14?

1 Answer

Impact of this question

2100 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-01-02T05:05:25

$22920$ $22920$ years

Explanation:

Count how many half-lives have elapsed.

$200 \to 100 s s s$ $200rarr100color(white)(sss)$ (1)
$100 \to 50 s s s$ $100rarr50color(white)(sss)$ (2)
$50 \to 25 s s s$ $50rarr25color(white)(sss)$ (3)
$25 \to 12.5 s s s$ $25rarr12.5color(white)(sss)$ (4)

$4$ $4$ half-lives have occurred. The half-life of carbon-14 is $5730$ $5730$ years.

$5730 \times 4 = 22920$ $5730xx4=22920$

Science

Math

Humanities

... and beyond

If a live log contains 200g of carbon-14, how old is buried long that contains 12.5g of carbon-14?

1 Answer

Explanation:

Related questions

Impact of this question