# college geology dealing with carbon 14

ok in my professors notes he calculates carbon 14 age in an example.

The problem goes like this:
Sample contains 110g carbon
sample produces 70 disintegrations per minute.
That is 0.7 disintegrations per minute.
T=(1/lambda)ln(N0/Nt)

Then he substitutes:
t=(1/1.209*10^-4/year)ln(1600/70)

I just want to know where did he get 1600 from?

1. 👍 0
2. 👎 0
3. 👁 64
1. No is 1600 disintegrations per minute, it was the disintegrations per minute in the original sample at the beginning.

What concerns me is the last two lines of your text notes..
sample produces 70 disintegrations per minute, that is .7 diintegrations per minute. Huh?

1. 👍 0
2. 👎 0
2. I wrote exactly what he had in his notes. so what should the actual t=? is everything else correct except the 1600? I have no examples in my book.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### statistic

3 statistics professors and 7 chemistry professors are available to be advisors.If each professor has an equal chance of being selected, what is the probability that both professors are cgemistry professors?

asked by Michaela on November 13, 2013
2. ### physics

How do I do this ? Calculate the age of a plant sample that shows about one-eigth of the carbon 14 of a living sample. The half-life of carbon-14 is about 5760a I don't have the notes on how to do this one... Help

asked by Murray on May 31, 2012
3. ### Math

Textbooks in Professorsâ€™ Offices If the average number of textbooks in professorsâ€™ offices is 16, the standard deviation is 5, and the average age of the professors is 43, with a standard deviation of 8, which data set is more

asked by aderaw on November 21, 2018
4. ### statistics

If the average number of textbooks in professors offices is 16 with a standard deviation of 5; and the average age of professors is 43 with a standard deviation of 8. Calculate the covariance of the number of textbooks in

asked by Leannes on May 10, 2012
5. ### Math

How do you figure this problem out? How many different committees can be formed from 5 professors and 15 students if each committee is made up of 2 professors and 10 students? THANKS!!!!! The limiting factor is the students. You

asked by Haley on September 25, 2006
6. ### statistics

if the average number of textbooks in professors' offices is 16, the standard deviation is 5, and the average age of the professors is 43,with a standard deviation of 8 ,which data set is more variable ?

asked by linda on March 10, 2012
7. ### Chemistry

What is the famous isotope used in archeological dating? carbon 12 I thought it was carbon 14 yes carbon 14-- made an error But if you knew, why are you asking these questions? I need reaasurance, so when I have a test I know the

asked by Schooler on October 15, 2006
8. ### ChemB

The activity of carbon 14 in living tissue is 15.3 disintegrations per minute per gram of carbon. The limit for reliable determination of age is based on carbon 14 is .10 disintegration per min per gram of carbon. Calculate the

asked by L.Bianchessi on January 23, 2012
9. ### Physics

Could someone help explain this problem to me . . . Carbon 14 has a half-life of 5700 year, scientist use this fact to determine the age of things made of organic material. Suppose the average page of a book containing aprox.

asked by Andy on December 9, 2007
10. ### Science

The relative age of a rock is ? 1. its age based on how much carbon-14 it contains 2. its age compared with the ages of other rocks 3. less than the age of the fossils it contains 4. the number of years since it formed my answer

asked by China one on September 30, 2015

More Similar Questions