Recent experiments suggest that the lifetime of the proton is over 1033 years,more than what is predicted by the simplest grand unified theories.
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Q19: Einstein's famous equation E = mc2 is
Q20: A lepton interacts via the strong interaction.
Q21: There are three flavors of quarks.
Q22: Baryon number is conserved in all interactions.
Q23: Quarks are held together by the color
Q25: A photon is a boson.
Q26: The quark structure of the proton is
Q27: Electroweak theory results in models for combining
Q28: The quark structure of the neutron is
Q29: Every particle has a corresponding antiparticle.
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