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kym02
 one year ago
One gram of a living plant containing Carbon14, decays at about 16 disintegrations per minute. It is found that one gram of a dead plant decays at 1 disintegration per minute. The halflife of Carbon14 is about 5500 years. Calculate the probable age of the plant. Thank you.
kym02
 one year ago
One gram of a living plant containing Carbon14, decays at about 16 disintegrations per minute. It is found that one gram of a dead plant decays at 1 disintegration per minute. The halflife of Carbon14 is about 5500 years. Calculate the probable age of the plant. Thank you.

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LunarSolstice
 one year ago
Best ResponseYou've already chosen the best response.11 dpm is about 4 half lives from the start = 16 dpm. (168421). Thus, 4 halflives X 5500 years = about 22,000 years.

douglaswinslowcooper
 one year ago
Best ResponseYou've already chosen the best response.01/16 rate is (1/2)^n where n = # halflives. n = 4, so 4 x 5500 = 22,000 years, as @LunarSolstice just found.
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