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A sample of WOod from an Egyptian mummy case taken from an archaeological site is subjected to radiocarbon dating. The activity due to 1"C has a specific activity of 10.41 d/min.g. The activity of a carbon sample of equal mass from fresh wood is 16.3 d/m.g. How old is the case? What is the natural logarithm (In) of the ratio between the Carbon-14 activity of the wood found in the Egyptian mummy case and the fresh wood? The remnants of an ancient fire in a cave in Africa showed a '{C decay rate of 3.9 counts per minute per gram of carbon. If the decay rate in C-14 in freshly cut wood, is 13.6 counts per minute per gram of carbon, how many years ago did the campfire occur?

A sample of WOod from an Egyptian mummy case taken from an archaeological site is subjected to radiocarbon dating. The activity due to 1"C has a specific activity of 10.41 d/min.g. The activity of a carbon sample of equal mass from fresh wood is 16.3 d/m.g. How old is the case? What is the natural logarithm (In) of the ratio between the Carbon-14 activity of the wood found in the Egyptian mummy case and the fresh wood? The remnants of an ancient fire in a cave in Africa showed a '{C decay rate of 3.9 counts per minute per gram of carbon. If the decay rate in C-14 in freshly cut wood, is 13.6 counts per minute per gram of carbon, how many years ago did the campfire occur?

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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A sample of wood from an Egyptian mummy case taken from an archaeological site is subjected to radiocarbon dating. The activity due to 14C has a specific activity of 10.41 d/min.g. The activity of a carbon sample of equal mass from fresh wood is 16.3 d/m.g. How old is the case? What is the natural logarithm (In) of the ratio between the Carbon-14 activity of the wood found in the Egyptian mummy case and the fresh wood? The remnants of an ancient fire in a cave in Africa showed a C decay rate of 3.9 counts per minute per gram of carbon. If the decay rate in C-14 in freshly cut wood, is 13.6 counts per minute per gram of carbon, how many years ago did the campfire occur? What is the value of In (Ao/A1)? A rock contains 0.257 mg of Pb-206 for every milligram of U-238.The half-life for the decay of U-238 to Pb-206 is 4.5 x 10°. How old is the rock? What is the natural logarithm of the proportion between the parent isotope and daughter isotope?
Transcribed Image Text:A sample of wood from an Egyptian mummy case taken from an archaeological site is subjected to radiocarbon dating. The activity due to 14C has a specific activity of 10.41 d/min.g. The activity of a carbon sample of equal mass from fresh wood is 16.3 d/m.g. How old is the case? What is the natural logarithm (In) of the ratio between the Carbon-14 activity of the wood found in the Egyptian mummy case and the fresh wood? The remnants of an ancient fire in a cave in Africa showed a C decay rate of 3.9 counts per minute per gram of carbon. If the decay rate in C-14 in freshly cut wood, is 13.6 counts per minute per gram of carbon, how many years ago did the campfire occur? What is the value of In (Ao/A1)? A rock contains 0.257 mg of Pb-206 for every milligram of U-238.The half-life for the decay of U-238 to Pb-206 is 4.5 x 10°. How old is the rock? What is the natural logarithm of the proportion between the parent isotope and daughter isotope?
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