Exam 12: Special Relativity and Elementary Particles

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The prediction of special relativity that moving clocks run slow is

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The __________ binds quarks together.

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The six quantum numbers for quarks are __________,__________,__________,__________,__________,and __________.

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t and b quarks are named

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Since the rest energy of an electron and its antiparticle a positron is 0.511 MeV,a gamma ray must have an energy larger than 1.022 MeV to produce an electron-positron pair.

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​Match each item with the correct statement below.​ -theory for which S.Weinberg and A.Salam shared the 1979 Nobel Prize in physics

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Because of the equivalence of mass and energy,an electron and a positron,which are two massive particles,can annihilate when they come together to produce two photons,which have no mass.

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All quarks have 1/3 the electric charge of an electron.

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The mass of an electron and its antiparticle,a positron,is 0.511 MeV/c2.In order to produce an electron-positron pair,a gamma ray must have an energy larger than 1.022 MeV because __________.

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There are three flavors of quarks.

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What is the quark structure of a proton?

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A particle with a half-integral spin is a

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If the electron is a lepton,then the antilepton is a(n)__________.

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​Match each item with the correct statement below.​ -quantum "charge" first explicitly manifested in the D0 meson

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The spin of elementary particles is quantized.

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Special relativity predicts that the length of a moving object will be elongated in the direction of motion.

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The notation used to represent an antiparticle is

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The quark and antiquark in a meson are always of the same flavor.

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If a 1 kg mass is completely converted into energy,the amount of energy released would be __________.

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__________ is the collective name given for particles that interact via the strong force.

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