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Chapter 39: Problem 32
A proton is made of 2 up quarks and a down quark (uud). Calculate its charge.
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A proton and neutron interact via the strong nuclear force. Their interaction is mediated by a particle called a meson, much like the interaction between charged particles is mediated by photons-the particles of the electromagnetic field. a) Perform a rough estimate of the mass of the meson from the uncertainty principle and the known dimensions of a nucleus \(\left(\sim 10^{-15} \mathrm{~m}\right)\). Assume the meson travels at relativistic speed. b) Use a line of reasoning similar to the one in part (a) to prove that the theoretically expected rest mass of the photon is zero. \(.\)
Consider the proposed reaction \(\pi^{0}+n \rightarrow K^{-}+\Sigma^{+}\). Can this reaction occur?
Some particle detectors measure the total number of particles integrated over part of a sphere of radius \(R\) from the target. Assuming symmetry about the axis of the incoming particle beam, use the Rutherford scattering formula to obtain the total number of particles detected as a function of the scattering angle \(\theta\).
What baryons have a quark content of \(u d s ?\) What is the mass of these baryons?
Which of the following experiments proved the existence of the nucleus? a) the photoelectric effect b) the Millikan oil-drop experiment c) the Rutherford scattering experiment d) the Stern-Gerlach experiment
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