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 Request Answer What would its initial activity have been? Ro= G| ΑΣΦ P Pearson ? ? Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | decays/min Revie 10:02 AM 12/12/2022

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 Request Answer What would its initial activity have been? Ro= G| ΑΣΦ P Pearson ? ? Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | decays/min Revie 10:02 AM 12/12/2022

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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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.
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Part A Compute the energy released in the fission reaction n+ 239 Pu → 137 Xe+ 100 Zr + 3n Atomic mass of 137 Xe is 136.911562 u, atomic mass of 100 Zr is 99.91776 u, and atomic mass of 239 Pu is 239.052157 u. Express your answer in megaelectron volts. ΔΕ MeV Submit Request Answer
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Part A Calculate the total binding energy, and the binding energy per nucleon, for Li. The masses of the atoms of Li and H are 7.016004 u and 1.007825 u, respectively. The mass of a neutron is 1.008665 u. Express your answers using four significant figures separated by a comma. Etotal, Eper nucleon = MeV
QUESTION 13 The following table of probabilistic time estimates (in weeks) and activity predecessors are provided for a project Immediate Most Probable Predecessor Activity A B C D E F G H Table 1 Reference: Ref 1 A, B B C D, E F Optimistic Time Time 11 13 5 13 6 3 4 6 2 3 10 5 6 8 4 13 Using Table 1, the earliest start time for activity G is OA. 0.0 weeks. OB. 10.0 weeks. O C. 10.5 weeks. O D. 15.5 weeks. O E. None of the above Pessimistic Time 14 19 14 7 11 13 6 9 decessors are p
2. Consider two gamma radioactive sources: S1 has activity 50 µCi (micro-Curie) and S2 has activity 25 µCi (micro-Curie). They are separated by 1 m. Assume that both sources are pointlike. s1 S2 1 m a) At which location along the dashed line passing by the two sources is the flux due to S1 equal to the flux due to S2 ? b) What is the gamma fluence in that location in a time interval of two minutes ?
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Part A Some atomic masses Particle Symbol Mass (u) Electron e 0.00055 Part B Proton 1.00728 Neutron 1.00866 Part C Hydrogen 1.00783 Helium 4He 4.00260 Part D Part E Part F Calculate the binding energy per nucleon of the helium nucleus He. Express your answer in megaelectron volts to two significant figures. ? MeV