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Author Question: The radiocarbon content of 14C decreases after the death of a living system with a half-life of 5730 ... (Read 71 times)

corkyiscool3328

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on: Jul 28, 2018
The radiocarbon content of 14C decreases after the death of a living system with a half-life of 5730 y. If an archaeologist working a dig finds an ancient firepit containing some partially consumed firewood and the wood contains only 12.5 percent of the 14C content of an equal carbon sample from a present-day tree, what is the age of the ancient site?

Question 2

The half-life of 131I is 8 days. On a certain day, the activity of an 131I sample is 6.4 mCi. What is its activity 40 days later?


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izzat

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Reply #1 on: Jul 28, 2018
Answer to Question 1

17 190 years

Answer to Question 2

200 mCi


corkyiscool3328

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Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

phuda

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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