COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 28, Problem 13QAP
To determine
The quark of composition of an antiproton.
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Positive and negative pions, denoted π+ and π-, are anti-particles of each other. Each has a rest mass of 140 MeV/c2. Suppose a collision between an electron and positron, each with kinetic energy K, produces a π+, π- pair. What is the smallest possible value for K?
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The amount of meat in prehistoric diets can be determined by measuring the ratio of the isotopes nitrogen-15 to nitrogen-14 in bone from human remains. Carnivores concentrate 15N15N, so this ratio tells archaeologists how much meat was consumed by ancient people. Suppose you use a velocity selector to obtain singly ionized (missing one electron) nitrogen atoms of speed 8.50 km/skm/s and bend them along a semicircle within a uniform magnetic field. The 14N14N atoms travel along a semicircle with a diameter of 32.2 cmcm. The measured masses of these isotopes are 2.32×10−26kg2.32×10−26kg (14N14N) and 2.49×10−26kg2.49×10−26kg (15N15N).
Part A.
Find the separation of the 14N14N and 15N15N isotopes at the detector.
Express your answer with the appropriate units.
What particle does the X stand for in the antimuon decay mu+ --> ve + vmu + X? Explain how you know.
Chapter 28 Solutions
COLLEGE PHYSICS
Ch. 28 - Prob. 1QAPCh. 28 - Prob. 2QAPCh. 28 - Prob. 3QAPCh. 28 - Prob. 4QAPCh. 28 - Prob. 5QAPCh. 28 - Prob. 6QAPCh. 28 - Prob. 7QAPCh. 28 - Prob. 8QAPCh. 28 - Prob. 9QAPCh. 28 - Prob. 10QAP
Ch. 28 - Prob. 11QAPCh. 28 - Prob. 12QAPCh. 28 - Prob. 13QAPCh. 28 - Prob. 14QAPCh. 28 - Prob. 15QAPCh. 28 - Prob. 16QAPCh. 28 - Prob. 17QAPCh. 28 - Prob. 18QAPCh. 28 - Prob. 19QAPCh. 28 - Prob. 20QAPCh. 28 - Prob. 21QAPCh. 28 - Prob. 22QAPCh. 28 - Prob. 23QAPCh. 28 - Prob. 24QAPCh. 28 - Prob. 25QAPCh. 28 - Prob. 26QAPCh. 28 - Prob. 27QAPCh. 28 - Prob. 28QAPCh. 28 - Prob. 29QAPCh. 28 - Prob. 30QAPCh. 28 - Prob. 31QAPCh. 28 - Prob. 32QAPCh. 28 - Prob. 33QAPCh. 28 - Prob. 34QAPCh. 28 - Prob. 35QAPCh. 28 - Prob. 36QAPCh. 28 - Prob. 37QAPCh. 28 - Prob. 38QAPCh. 28 - Prob. 39QAPCh. 28 - Prob. 40QAPCh. 28 - Prob. 41QAPCh. 28 - Prob. 42QAPCh. 28 - Prob. 43QAPCh. 28 - Prob. 44QAPCh. 28 - Prob. 45QAPCh. 28 - Prob. 46QAPCh. 28 - Prob. 47QAPCh. 28 - Prob. 48QAPCh. 28 - Prob. 49QAP
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- Another component of the strong nuclear force is transmitted by the exchange of virtual Kmesons. Taking Kmesons to have an average mass of what is the approximate range at this component of the strong force?arrow_forwardCheck Your Understanding What is the strangeness number of a muon?arrow_forwardWhen an electron and position annihilate, both their masses are destroyed, creating two equal energy photons to preserve momentum. (a) Confirm that the annihilation equation e++e+ conserves charge, electron family number, and total number of nucleons. To do this, identify the values of each before and after the annihilation. (b) Find the energy of each ray, assuming the election and positron are initially nearly at rest. (c) Explain why the two rays travel in exactly opposite directions if the center at mass of the electron—positron system is initially at rest.arrow_forward
- It is estimated that weapons tests in the atmosphere have deposited approximately 9 MCi of 90Sr on the surface of the earth. Find the mass of this amount of 90Sr.arrow_forwardThe decay of one type of Kmeson is cited as evidence that nature favors matter over antimatter. Since mesons are composed of a quark and an antiquark, is it surprising that they would preferentially decay to one type over another? Is this an asymmetry in nature? Is the predominance of matter over antimatter an asymmetry?arrow_forwardIntegrated Concepts Calculate the relativistic quantity for 1.00TeV protons produced at Fermilab. (b) If such a proton created a having the same speed, how long would its life be in the laboratory? (c) How far could it travel in this time?arrow_forward
- Integrated Concepts Suppose you are designing a proton decay experiment and you can detect 50 percent of the proton decays in a tank of water. (a) How many kilograms of water would you need to see one decay per month, assuming a lifetime of 1031 y? (b) How many cubic meters of water is this? (c) If the actual lifetime is 1033 y, how long would you have to wait on an average to see a single proton decay?arrow_forwardExperimental results indicate an isolate particle with charge +2/3 —an isolated quark. What quark could this be? Why would this discovery be important?arrow_forwardThe reaction (described in the preceding problem) takes place via the strong force. (a) What is the baryon number of the particle? (b) Draw a Feynman diagram of the reaction showing the individual quarks involved.arrow_forward
- (a) Verify from its quark composition that the particle could be an excited state of the proton. (b) There is a spread of about 100 MeV in the decay energy of the interpreted as uncertainty due to its short lifetime. What is its approximate lifetime? (c) Does its decay proceed via the strong or weak force?arrow_forwardMassless particles are not only neutral, they are chargeless (unlike the neutron). Why is this so?arrow_forwardWhen a nucleus (decays, does the (particle move continuously from inside the nucleus to outside? That is, does it travel each point along an imaginary line from inside to out? Explain.arrow_forward
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