Problem

1. a Outline how scientists are able to use radioactive carbon-14 to find the age of fossilised organic material. 2. b A sample of 1 g of a growing oak tree will produce a corrected count of 144 in a time of 10 minutes. - i What uncertainty is there in this corrected count? - ii The half-life of

{}_{6}^{14}\text{C}

is 5700 years. How old would a fossilised piece of oak tree be if the corrected count in ten minutes from it was 18? 3. c Scientists used radiocarbon dating to determine the amount of

{}_{6}^{14}\text{C}

in a historic artefact. They found it was 92% of that in living tissue. How old is the artefact?

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