If the ratio of carbon-14 to carbon-12 in a piece of bone is only one-half of the atmospheric ratio, how old is the bone?
If the ratio of carbon-14 to carbon-12 in a piece of bone is only one-half of...
The ratio of carbon-14 to carbon-12 in a piece of charcoal from an archeological excavation is found to be one-half the ratio in a sample of modern wood. Approximately how old is the charcoal? a) 3,000 years b) 6,000 years c) 9,000 years d) 12,000 years
Carbon 14 has a half-life of 5.73*10^3 years. C-14 in a piece of living bone has an activity of 14 decays per minute per gram of bone. If a bone found under a parking lot in San Diego has an activity of 3.5 decays per minute per gram of bone, then approximately how long has it been since the bone was alive?
1. The half-life of carbon-14 is 5730 years. A sample is found to have one-eighth the original amount of carbon-14 in it. How old is the sample? 5730 years, 716 years, 45800 years, 17200 years 2. Why wouldn't you use carbon-14 dating on a piece of shell that was estimated to be 1 million years old? Sea shells do not have radioisotopes, carbon dating is only useful on plants, uranium dating is better for items older than 1/2 million years,...
18 of 30 (17 comple If a bone contains 92% of its original carbon-14, how old is the bone? (Carbon-14 has a half-life of 5730 years.) The bone is years old (Round the final answer to the nearest year as needed. Round all intermediate values to six decimal places as needed.)
The carbon-14 to nitrogen-14 radiometric isotope decay series has a half-life of 5 730 years. If you find an ancient bone in Africa that has a ration of carbon-14 to nitrogen-14 of 1:15, how old is the bone?
The half-life of carbon-14 is roughly 5,700 years. In the pre-industrial atmosphere, there was approximately one atom of carbon-14 for every trillion atoms of carbon-12. In a fossil that is 17,100 years old, how many atoms of carbon-12 would there be for every atom of carbon-14? Approximately Select one: a. three trillion b. one trillion c. four trillion d. eight trillion e. two trillion
The half-life of carbon-14 is roughly 5,700 years. In the pre-industrial atmosphere, there was approximately one atom of carbon-14 for every trillion atoms of carbon-12. In a fossil that is 17,100 years old, how many atoms of carbon-12 would there be for every atom of carbon-14? Approximately Select one: a. three trillion b. four trillion c. eight trillion d. two trillion e. one trillion
thank you for the help. The half-life of carbon-14 is 5600 years. If a piece of charcoal made from the wood of a tree shows only 74% of the carbon-14 expected in living matter when did the tree die? The tree died about years ago (Do not round until the final answer Then round to the nearest whole number.)
Moving to another question will save this response stion 24 Carbon-14 has a half-life of 5720 years and this is a first order reaction. If a piece of wood has lost 75% of its carbon 14 (so only ), then how old is A 1430 years B.2375 years c 4750 years 0.4290 years . 11440 years
Carbon 14 is a radioactive isotope produced in the upper atmosphere by cosmic rays. It has a half-life measured as 5730 : 40 years. Since plants and animals absorb carbon from the atmosphere, the percentage of carbon a living organism contains that is carbon 14 is equal to the percentage of carbon 14 in the atmosphere. When an organism dies, however (or when a layer of wood is laid down as bark in a tree), it ceases to absorb carbon....