- #1
HaiderAbbas
- 4
- 0
Homework Statement
Please help me solve this problem...
Given T(1/2) of U-235 = 7.04x10^8 yrs (0.7%)
T(1/2) 0f U-238 = 4.468x10^9 yrs (99.3%)
Calculate percentage of U-235 & U-238 at the time of creation of earth(~4.5 billion years ago)
Homework Equations
N(t) = No e^(-λt)
The Attempt at a Solution
λ(U-235) = 9.84x10^-10 per year
λ(U-238) = 1.55x10^-10
Now m confused how to proceed further with percentages...?