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A piece of wood form the ruins of an nuclei an ancient building was found to have a .^(14)C activity of 12 disintegrations per minute per gram of its carbon content. The .^(14)C activity of the living wood is 16 disintegrations/minute/gram. How long ago did the trees, form which the wooden sample came, die? Given half-life of .^(14)C is 5760yers .
In the atmosphere, carbon dioxide is found in two forms, i.e., .^(12)CO_(2) and .^(14)CO_(2) . Plants absorb CO_(2) during photosynthesis. In presence of chlorophyll, plants synthesise glucose. 6 CO_(2) + 6 H_(2) O to overset(hv)(to) C_(6)H_(12)O_(6) + 6O_(2) uarr Half life of .^(14)C is 5760 years. The analysis of wooden artifacts for .^(14)C and .^(12)C gives useful information for deermination of its age. all living organisms, because of their constant exchange of CO_(2) with the surrounding have the same ratio of .^(14)C to .^(12)C , i.e., 1.3 xx 10^(-12) . When an organism dies, the .^(14)C in it keeps on decaying as follows: ._(6)^(14)C to ._(7)^(14)N + ._(-1)^(0)e + Energy Thus, the ratio .^(14)C//^(12)C decrease with the passage of time. we can be used to date anything made of organic matter, e.g., bone, skeleton, wood, etc. Using carbon dating material have been dated to about 50,000 years with accuracy. A wooden piece is 11520 yrs old. What is the fraction of .^(14)C activity left in the piece?
The half-life of ._(6)C^(14) is 5730 years. What fraction of a sample of ._(6)C^(14) will remain unchanged after a period of five half-llves ?
A sample of wooden artifact is found to undergo 9 disintegration per minute per gram of carbon. What is the approximate age of the artifact? The half life of ._(6)^(14)C is 5730 years and radioactivity of wood recently cut is 15 disintegrations per minute per gram of carbon.
DINESH PUBLICATION-EVIDENCES OF EVOLUTION-CHECK YOUR GRASP
