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Chapter 39: Problem 2

Which of the following is a composite particle? (select all that apply) a) electron b) neutrino c) proton d) muon

Short Answer

Expert verified
Answer: c) proton

Step by step solution

01

Review of terminology:

It is important to understand the terminology in order to solve this problem. Fundamental particles are the elementary building blocks of matter and cannot be broken down into smaller components, while composite particles are made up of two or more fundamental particles. In this exercise, we need to identify which of the given particles are composite particles.
02

Identify the fundamental particles:

From the list of particles provided, we can identify the following as fundamental particles (these are sometimes referred to as elementary particles): 1. electron 2. neutrino 3. muon These particles are considered fundamental because they are not made up of smaller particles.
03

Identify the composite particle(s):

Looking at the remaining particle in the list, the proton, we can see that it is composed of smaller particles called quarks. Specifically, a proton consists of two up quarks and one down quark, making it a composite particle.
04

Final answer:

Out of the given particle list, only the proton (c) is a composite particle, while the others (electron, neutrino, and muon) are fundamental particles.

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Most popular questions from this chapter

Consider a hypothetical force mediated by the exchange of bosons that have the same mass as protons. Approximately what would be the maximum range of such a force? You may assume that the total energy of these particles is simply the rest-mass energy and that they travel close to the speed of light. If you do not make these assumptions and instead use the relativistic expression for total energy, what happens to your estimate of the maximum range of the force?

Draw a Feynman diagram for an electron-proton scattering, \(e^{-}+p \rightarrow e^{-}+p\), mediated by photon exchange.

Draw a quark-level Feynman diagram for the decay of a neutral kaon into two charged pions, \(K^{0} \rightarrow \pi^{+}+\pi^{-}\).

Between neutron scattering and electromagnetic waves scattering (like X-rays or light), which of the two would be more appropriate for investigating the scattering cross section of the atom as a whole, and which would be more appropriate for investigating the nucleus of an atom? Which one will depend on \(Z\), the atomic number?

A Geiger-Marsden experiment, where \(\alpha\) particles are scattered off of a thin gold film, yields an intensity of particles of \(I\left(90^{\circ}\right)=100 .\) counts/s at a scattering angle of \(90^{\circ} \pm 1^{\circ} .\) What will be the intensity of particles at a scattering angle of \(60^{\circ} \pm 1^{\circ}\) if the scattering obeys the Rutherford formula?
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