PDA

View Full Version : the equation is N=O(0.5)t/h

Rhoda_97
Nov 30, 2011, 05:55 PM
Trying to help my nephew over the phone. He says h is 30 years, we have 500 grams of element-90 and 60 years has passed
Unknown008
Nov 30, 2011, 11:23 PM
Just... use the equation?

N = O(0.5)^{t/h}

h = 30
N = 500
t = 60

Find O.
Rhoda_97
Dec 12, 2011, 01:08 PM
Thank you. Seems so easy now.
Unknown008
Dec 12, 2011, 09:53 PM
You're welcome :)