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carbon 14 is in all living things because of its uptake from the air since uptahe seasis at death, and a decay of c 14 proceeds, its amount of decay lets one know the lengh of time since death, how is thelevel of c14 maintained the the living item to allow his measurement to be valid?
ok so the c14 is taken up in food however how is the amount of c14 in any once living hing constant enough to accurately determine age by the amount on c14 decay
it may be the way i am asking the question, but we are not connecting, it maybe that this should be asked of a in the physics department, i do not know how i got into a medical section as this is my first time of asking
i would have rated my questions on the poor side if there had been a self evaluation. you added no new information to my queastion and somehow the two of us did not seem to connect on what my question covered. so there is some c14 in the soil, which likely comes from the photosynthesis in plants, since the inseption of the earth there has been more than enough half lives of c 14 to effectively have zero left even if we started with 100%c14. since there is come left or still existing how was it replenished??
found the answer re c 14, nitrogen hit by cosmic radiarion in the upper atmosphere yields energy a particle and c 14, guess the % n in the atmosphere is constant enough to base a dateing technique, incidently c 14 is 1 pert per trillion even so dateing 0 to 40,000 yrs are common
i have answered you and rated you , i told you the answer before you told me. seems as though all you are looking for is a rateing of great. if that is what it takes for you to stop writing me , so be it however be informed i will be seeking answers on my own from now on as i seem to interpret my queastions more easily , and arrive at an answer sooner, bye