Fundamental Forces and Particles Quiz
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Questions and Answers

Which of the following is NOT a fundamental force in nature?

  • Friction force (correct)
  • Weak nuclear force
  • Strong nuclear force
  • Electromagnetic force
  • What is the rest mass of a positron?

  • 1.60 x 10^-19 kg
  • 9.11 x 10^-31 kg (correct)
  • Zero
  • -9.11 x 10^-31 kg
  • What does the process of annihilation produce when a particle and its antiparticle meet?

  • A single photon
  • No particles are produced
  • A new particle with a different mass
  • A pair of high-energy photons (correct)
  • Which of the following is the antiparticle of a neutron?

    <p>Antineutron (B)</p> Signup and view all the answers

    Which fundamental force is responsible for beta decay?

    <p>Weak nuclear force (B)</p> Signup and view all the answers

    Which of the following is NOT a fundamental particle?

    <p>Proton (D)</p> Signup and view all the answers

    Which of the following forces is responsible for the interaction of hadrons?

    <p>Strong nuclear force (A)</p> Signup and view all the answers

    Which of the following particles is a hadron?

    <p>Meson (D)</p> Signup and view all the answers

    How do leptons differ from hadrons?

    <p>Leptons are not affected by the strong nuclear force, while hadrons are. (D)</p> Signup and view all the answers

    The discovery of the Higgs boson helps explain which of the following?

    <p>Why all particles have mass. (B)</p> Signup and view all the answers

    What is the primary function of the Large Hadron Collider (LHC)?

    <p>To study fundamental particles using high-energy hadron collisions. (D)</p> Signup and view all the answers

    Based on Figure 2, what can you infer about the nature of hadrons?

    <p>They are composed of smaller subatomic particles. (C)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of quarks?

    <p>They have an integer charge. (B)</p> Signup and view all the answers

    What is the charge, in units of the elementary charge e, of a charm quark?

    <p>+\frac{2}{3} (C)</p> Signup and view all the answers

    Which of the following is a hadron?

    <p>Proton (D)</p> Signup and view all the answers

    What is the charge, in units of the elementary charge e, of an anti-down quark?

    <p>+\frac{1}{3} (D)</p> Signup and view all the answers

    What is the name of the force that holds quarks together within hadrons?

    <p>Strong nuclear force (B)</p> Signup and view all the answers

    Which two quarks make up a neutron?

    <p>Up and Down (D)</p> Signup and view all the answers

    How many types of quarks are there?

    <p>6 (D)</p> Signup and view all the answers

    What is the name of the novel by James Joyce from which the term 'quark' was inspired?

    <p>Finnegans Wake (C)</p> Signup and view all the answers

    If a particle has a charge of -1e, what could its quark composition be?

    <p>dss (D)</p> Signup and view all the answers

    Which of the following is NOT a baryon?

    <p>pion (C)</p> Signup and view all the answers

    What is the charge of a particle with the quark composition ūs̄?

    <p>-1e (D)</p> Signup and view all the answers

    A particle with the quark composition uds has a charge of 0e. What is the charge of a particle with the quark composition ūds̄?

    <p>-1e (B)</p> Signup and view all the answers

    Which of the following is a property of a meson?

    <p>Made up of a quark and an antiquark (C)</p> Signup and view all the answers

    Which of the following is NOT true about the principle of charge conservation?

    <p>Only applies to reactions involving hadrons. (C)</p> Signup and view all the answers

    What is the charge (in terms of 'e') of a particle with the quark combination: uds̄?

    <p>+1 (B)</p> Signup and view all the answers

    How many quarks are there in a π+ meson?

    <p>2 (D)</p> Signup and view all the answers

    Flashcards

    Antimatter

    Matter composed of antiparticles, which have opposite charges to particles.

    Antiparticle

    A particle that has the opposite charge of its corresponding particle.

    Annihilation

    Process where a particle and its antiparticle destroy each other, converting mass into energy.

    Four fundamental forces

    The basic forces: strong nuclear, electromagnetic, weak nuclear, gravitational influencing interactions.

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    Beta decay

    A type of radioactive decay involving the weak nuclear force, changing protons and neutrons.

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    Fundamental Particle

    A particle with no internal structure that can't be divided.

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    Hadrons

    Particles affected by strong nuclear force; examples are protons and neutrons.

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    Leptons

    Particles not affected by strong nuclear force; examples include electrons and neutrinos.

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    Strong Nuclear Force

    A force that holds quarks together in hadrons.

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    Electromagnetic Force

    The force that affects charged particles including hadrons and leptons.

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    Weak Nuclear Force

    A force responsible for certain particle decays.

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    Higgs Boson

    A particle that explains why other particles have mass.

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    Quark

    A fundamental particle that makes up hadrons.

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    Types of Quarks

    There are six types: up, down, charm, strange, top, bottom.

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    Charge of Up Quark

    The up quark has a charge of +2/3 elementary charge (e).

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    Anti-Quark

    A particle with the opposite charge of its corresponding quark.

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    Standard Model of Elementary Particles

    A theory describing the fundamental particles and their interactions.

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    Charge of Down Quark

    The down quark has a charge of -1/3 elementary charge (e).

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    Collisions in Particle Accelerators

    Experiments that reveal the existence of hadrons and quarks.

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    Proton

    A particle made of two up quarks and one down quark (uud), with a charge of +1e.

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    Neutron

    A particle made of one up quark and two down quarks (udd), with no charge.

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    Charge conservation

    The principle that total charge in an isolated system remains constant.

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    Quark composition of proton

    The proton consists of two up quarks and one down quark (uud).

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    Quark composition of neutron

    The neutron consists of one up quark and two down quarks (udd).

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    Baryons

    Hadrons composed of three quarks, including protons and neutrons.

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    Mesons

    Hadrons made of a quark and an anti-quark.

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    Charge of A particle (uds)

    The total charge is zero for a particle made of uds combination.

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    Positive quarks

    Quarks that carry a positive charge: up quark (+2/3)e.

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