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Charcoal Samples Taken from Holes Dug at Stonehenge, England, Have

Question 110

Multiple Choice

Charcoal samples taken from holes dug at Stonehenge, England, have a carbon-14 specific activity of 9.50 dpm per gram carbon. Living wood has a specific activity of 15.3 dpm per gram of carbon.Given that the half-life of carbon-14 is 5730 yr, how long ago was the wood part of a living plant?


A) 3940 yr
B) 3550 yr
C) 9230 yr
D) 5700 yr
E) 13300 yr

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