Exam 12: Special Relativity and Elementary Particles

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A __________ has integral spin.

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The color force between quarks is carried by __________.

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​Match each item with the correct statement below.​ -subatomic particles which possess a quantum "charge" that is conserved in strong and electromagnetic interactions,but not in weak interactions

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What is the quark composition of the strange Κ+ meson?

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Charm,beauty,and truth are three quantum numbers for quarks.

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All neutrinos are left handed.

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If a twin goes on a trip in a high-speed rocket ship,when she returns home she will be younger than her twin sister who did not go on the trip because of the special relativistic effect of __________.

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Short range interactions generally have carrier particles of greater mass than those for long range interactions.

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The prediction from special relativity that the length of a moving object will be shortened in the direction of motion is called __________.

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If a twin goes on a trip in a high-speed rocket ship,when she returns home she will be younger than her twin sister who did not go on the trip because of

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The lifetime of a free neutron is 887 s.If a neutron moves with a speed 2.9 × 108 m/s relative to an observer in the lab,what does the observer measure the neutron's lifetime to be?

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What is the symbol for a neutrino?

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Strangeness is conserved observed in strong and electromagnetic interactions,but not in weak interactions.

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An electron and a positron,which are two massive particles,can annihilate when they come together to produce two photons,which have no mass.This pair annihilation is an example of

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Baryon number is conserved in all interactions.

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A __________ does not interact via the strong interaction.

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How many quark colors are there?

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What is the mass of an electron in MeV/c2?

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A particle that interacts via the strong force is a(n)

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When it comes near a heavy nucleus,a gamma ray,which is a high energy photon,can "disappear," and in its place there will be produced an electron and a positron,which both have mass.This pair production is an example of

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