Asked by Korina
If a radioactive isotope has half life of 5 days,how long will it take for its radioactive strength to be a maximum of one thousandth,(1/1000) of its original value?
Can anyone give me a VERY SIMPLE explanation of this please?
Thank you.
Can anyone give me a VERY SIMPLE explanation of this please?
Thank you.
Answers
Answered by
drwls
Solve this equation for the number of days, x:
(0.5)^(x/5) = 1/1000
You can compute x by taking the log of both sides.
x/5 = 9.97
x = 49 days
The words "a maximum of" are not needed in your question. After 49 days, the radioactive strength will be exactly 1/1000 of the original value, except for rounding-off error. You only have one significant figure in the half-life.
(0.5)^(x/5) = 1/1000
You can compute x by taking the log of both sides.
x/5 = 9.97
x = 49 days
The words "a maximum of" are not needed in your question. After 49 days, the radioactive strength will be exactly 1/1000 of the original value, except for rounding-off error. You only have one significant figure in the half-life.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.