A pure carbon archaeological artefact has an age of 24421 years and emits 14 electrons per minute. Find the activity of the artefact at the time it was made. Assume that the half-life of ¹4C is 5730 years. Enter your answer in Bq to 1 decimal place.
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Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
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- Determine mass defect, the binding energy, and the binding energy per nucleon of an O-16 nucleus. The O-16 nucleus has a mass of 15.9905 amu. A proton has a mass of 1.00728 amu, a neutron has a mass of 1.008665 amu, an electron has a mass of 5.485799 x 10-4 amu and 1 amu is equivalent to 931 MeV of energy.The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from an archeological dig is measured to be 6.2*10^2 Bq. The activity in a similar-sized sample of fresh wood is measured to be 1.1*10^3 Bq. Calculate the age of the artifact. Round your answer to 2 significant digits.When a plant or animal dies, its 14C content decreases with a half-life of t¹/2 = 5730 years. If an archaeologist find an ancient fire-pit containing partially consumed firewood and the 14C content of the wood is 15% of what it would be for a similar carbon sample from a present day tree, what is the approximate age of the ancient site? 24.96.91.88 Enter your numerical result below, in units of years. Aim for a precision of 2 significant figures. Your Answer: Answer
- The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from an archeological dig is measured to be 6.1*10^3 Bq. The activity in a similar-sized sample of fresh wood is measured to be 6.9*10^3 Bq. Calculate the age of the artifact. Round your answer to 2 significant digits.A radioactive sample was measured 36.1 years ago. It had an activity of 99075.9 Bq. Today, its activity is 7.1 Bq. What is the decay constant (in years-1) of this substance?Hello please someone help me answer this problem set, thank you! Part A: A particular smoke detector contains 1.05 μCi of 241Am241Am, with a half-life of 458 years. The isotope is encased in a thin aluminum container. Calculate the mass of 241 Am in grams in the detector. Express your answer numerically in grams. Part B: Fears of radiation exposure from normal use of such detectors are largely unfounded. Identify reasons why 241 Am smoke detectors are perfectly safe. Select all that apply a. The penetrating power of αα radiation is limited. b. Ions get trapped by electrodes. c. The amount of americium is very little. d. The number of αα particles leaving the case is low. e. The detector has a plastic cover. f. The detector is housed in an aluminum case.
- A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 0.8 kg sample of carbon from the wood has an activity of 1550 decays per minute. Find the age of the charcoal. Living material has an activity of 15 decays/minute per gram of carbon present and the half-life of 14C is 5730 y. Answer in units of y.An archaeologist finds some ancient jewelry made from bone. The jewelry has a carbon mass of 148 g (HINT: Assume all the carbon is 12C and determine the number of atoms) and careful measurements show that the remaining 14C has a current decay rate of 17 decays/s. Determine the age of the bone (and presumably the jewelry). Remember, the ratio of 14C to 12C when the animal died was 1.3×10-12 & the half-life of 14C is 5730 y.age of bone =A 21186Rn nucleus undergoes alpha decay according to the reaction 21186Rn → 20784Po + 42He. Determine the following. (Let the atomic mass of 21186Rn be 210.9906 u, the atomic mass of 20784Po be 206.9816 u and the atomic mass of 42He be 4.0026 u.) (a)Q value (in MeV) for the process (Enter your answer to at least two decimal places.) (b)Kinetic energy (in MeV) of the alpha particle after the decay (Enter your answer to at least two decimal places.) (c) Kinetic energy (in MeV) of the daughter nucleus after the decay
- An ancient artifact is found to contain 240 g of carbon and has an activity of 479 decays/min. Part A Q Search What is the approximate age of the artifact, to the nearest thousand years? (The rate of decay of carbon in living matter is R 16 decays/(g. min).) Express your answer to the nearest thousand years. 15| ΑΣΦ Submit Part B What would its initial activity have been? Ro= Request Answer 15. ΑΣΦ P Pearson W ? ? y Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | decays/min Revie 10:02 AM 12/12/202214 6C has a half life of 5,730 years. How many 6 atoms would you need in order to measure an average of 10 decays per second? Round your answer to 2 decimal places.The half life of 60Co is 5.7 years. Find the activity of 3.54 milligram of 60Co. Give your answer in decays/second (Bq) Round your answer to 3 significant figures. Add your answer