Nuclear and particle 15

Nuclear and particle 15 - MasteringPhysics: Assignment...

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[ Print View ] Physics 228 Spring 2008 Nuclear and Particle Physics Due at 11:59pm on Monday, May 5, 2008 View Grading Details Multiple Choice Question - 43.20 Part A Which of the following is not true of the nuclear force? ANSWER: A nucleon in a large nucleus interacts via the nuclear force only with nearby nucleons, not with ones far away in the nucleus. For two protons in close proximity, the nuclear force and the electric force have comparable magnitudes. The nuclear force has a short range, of the order of nuclear dimensions. The nuclear force favors binding of pairs of protons or neutrons with opposite spin angular momenta. The nuclear force does not depend on charge. Multiple Choice Question - 43.1 Part A Which one of the following statements about the atomic nucleus is accurate? ANSWER: Heavy nuclei most easily undergo nuclear fusion. The nucleus is held together mostly by the electrical and gravitational forces. All nuclei have nearly the same density. A nucleus containing 20 nucleons will have approximately twice the radius as a nucleus containing 10 nucleons. Large nuclei are denser than light nuclei. Nuclear Binding Energy Part A Calculate the mass defect of the nitrogen nucleus . The mass of neutral is equal to 14.003074 atomic mass units. Hint A.1 Definition of mass defect Page 1 of 16 MasteringPhysics: Assignment Print View 5/8/2008 http://session.masteringphysics.com/myct/assignmentPrint?assignmentID=1116526
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Express your answer in atomic mass units to four significant figures. Hint not displayed Hint A.2 The masses of nucleons Hint not displayed ANSWER: 0.1124 Part B Calculate the binding energy of the nitrogen nucleus . Express your answer in millions of electron volts to four significant figures. Hint B.1 Definition of binding energy Hint not displayed Hint B.2 Conversion of mass to energy Hint not displayed Hint B.3 Converting joules to electron volts Hint not displayed ANSWER: = 104.7 Part C Calculate the binding energy per nucleon of the nitrogen nucleus . Express your answer in millions of electron volts to three significant figures. ANSWER: 7.48 Part D Calculate the mass defect of the helium nucleus . The mass of neutral is given by . Express your answer in atomic mass units to three significant figures. Hint D.1 Definition of mass defect Hint not displayed Hint D.2 The masses of nucleons Hint not displayed ANSWER: 3.04×10 2 Page 2 of 16 MasteringPhysics: Assignment Print View 5/8/2008 http://session.masteringphysics.com/myct/assignmentPrint?assignmentID=1116526
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Part E Calculate the binding energy of the helium nucleus . Express your answer in millions of electron volts to three significant figures. Hint E.1 Definition of binding energy Hint not displayed Hint E.2 Conversion of mass to energy Hint not displayed Hint E.3 Converting joules to electron volts Hint not displayed ANSWER: = 28.3 Part F Calculate the binding energy per nucleon of the helium nucleus . Express your answer in millions of electron volts to two significant figures.
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Nuclear and particle 15 - MasteringPhysics: Assignment...

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