Saturday

April 18, 2015

April 18, 2015

Posted by **Beth** on Friday, July 27, 2012 at 5:26pm.

I understand that I have to use the equation A=Ao EXP(-wavelength x T) and once i plug in the answer it always turns out to be 7300 or so which is the incorrect answer. Therfore allwing me not to be able to solve B. If anyone can help me in where my calculations went wrong that would be greatly appriciated.

- Physics -
**Elena**, Saturday, July 28, 2012 at 3:45pmA=Aₒ•e(-λ•t).

λ is the decay constant (not the wavelength!!!)

λ=ln2/T, where T is half-life

A/Aₒ= e(- ln2•t/T).

ln(A/Aₒ)= - ln2•t/T

ln(0.15/0.23)=ln(0.652)=

= - 4.27 = -ln2 •t/5730.

t=4.27•5730/ln2=35299 years

15% •35299/100% =5295 years

Ans. 35299±5295 years

- Physics -
**Anonymous**, Tuesday, August 14, 2012 at 9:02pmthis is wrong

- Physics -
**Aaron**, Monday, July 29, 2013 at 3:12pmElena was so close, it looks like a calculator error when calculating part A. The answer is off by a factor of ten. So 3529.9 years, not 35299.

- Physics -
**Derp**, Monday, July 29, 2013 at 6:01pmGood Guy Aaron

**Answer this Question**

**Related Questions**

Science - What process involves the comparison of rock layers with others in a ...

Geology - Does this sound right? Describe your assigned method and how it is ...

Chemistry - What is the famous isotope used in archeological dating? carbon 12 I...

Science- Radioactive Dating - Which of the following statements about ...

sci - are radiocarbon dating and carbon-14 dating the same thing?

sicence - Which example describes a method of relative dating? A. examining ...

science - Which example describes a method of relative dating? A. using fossils ...

6th grade science - Which is a method of relative dating? A. examining ...

ChemB - The activity of carbon 14 in living tissue is 15.3 disintegrations per ...

science - ok i have a couple questions. 1. How has life changed throughout Earth...