Question

i need help with radioactive decay problems.

Answer 1

so i have the formula \[A=A _{0}e ^{kt}\]
the half life of cesium-137 is 30 years suppose we have a 10g sample
a) find a function that models the mass remaining after "t" years

Answer 2

Hi kylhea

Answer 3

http://1728.org/halflife.htm

Answer 4

Ending Amount = Beginning Amount / 2^n
in which n = number of half lives (or time / half life)

the half life of cesium-137 is 30 years suppose we have a 10g sample a) find a function that models the mass remaining after "t" years
Ending Amount = 10g / 2^(t/30)
Just to test this let's try amount after 30 years
Ending Amount = 10g / 2^(t/30)
Ending Amount = 10g / 2^(30/30)
Ending Amount = 10g / 2
Ending Amount = 5 grams

Answer 5

So hey, how about those Boston Red Sox? LOL

Answer 6

haha i need an equation for a) not a value so i think it should be