I can't figure this out , i've tried and tried but I was absent the day they explained this and I have no idea at all what decays/min is or any of that. I've solved 9 problems and I'm missing 4, and one of them is similar to this one that I will try to answer once you try explain this one to me.(adsbygoogle = window.adsbygoogle || []).push({});

Thank you very much!

1. The problem statement, all variables and given/known data

A 13.4756 g sample of petriﬁed wood was found in a petriﬁed forest. The sample showed a

C-14 activity of 11 decays/min.

How long has the tree been dead? The halflife of carbon-14 is 5730 years and freshly cut

wood contains 6.5 × 10^10 atoms/g of C-14 and there are 365.25 days in a year.

Answer in units of years.

2. Relevant equations

N=N0ek*t i think it's this? But I have no idea on how to use this

3. The attempt at a solution

I would try if I knew where to start lol

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Can't figure this radioactive thing out

**Physics Forums | Science Articles, Homework Help, Discussion**