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1. Frank William Libby invented the method of using the half-life of carbon-14 to date objects, 2. Radiocarbon dating is used to date a variety of sources but the main factor is that the sources would have had to once be a carbon-life form the carbon is passed through living things through the food-chain starting from the plants who breathe it in from the upper atmosphere. Examples include: Wooden objects trees Wool Cloth Humans Bones/skeleton Ships e.t.c 3. a) this is the time taken for half of the nuclei in a radioactive source to decay. For example, the half-life of carbon-14 is 5730 years. b) On graph paper c) The half-life of carbon-14 according to my graph is about 5700-5720 years as you can see on my graph, it took 5700 years for the com to decrease from 1200 to 60 and another 5700 years for that to half into 30 cpm. This is fairly correct compared to...

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