- #1
physics(L)10
- 101
- 0
Homework Statement
Radioactive iodine (131-I) has a half life of 8 days. How long does it take for iodine to be reduced by factor of 100?
Homework Equations
N(t)=N(o)e-kt
k=ln100/t1/2
The Attempt at a Solution
N(t)=N(o)e-kt
N(t)/N(o)=e-ln(100/8)t
Now I'm stuck. I would think to to take the ln of both sides, but there isn't any values given for N(t) or N(o). Also, the value of k I'm pretty sure is right...Any confirmation on this?
Thanks a lot for your help :)