Strontium-90 is used in machines that control the thickness of paper during the manufacturing process. Stront-90 has a half-life of 28 years. Determine how much time has elapsed if the following fraciton of a strontium-90 sample remains?Strontium-90 is used in machines that control the thickness of paper during the manufacturing process. Stront-
let's say the fraction is f, and time is t (in years).
f = (0.5)^(t/28)
ln both sides
ln(f) = (t/28)*ln(0.5)
divide by ln(0.5)
[ln(f) / ln(0.5)] = t / 28
multiply by 28
28*[ln(f) / ln(0.5)] = t
with the above equation, you can solve for t with any f.Strontium-90 is used in machines that control the thickness of paper during the manufacturing process. Stront-
What's the following fraction?
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment