Question 1

The proton is made up of which one of the following quark combinations (up,down,strange,charm,top,bottom) ?

Accepted Answer

A)  uud
B)  ddu
C)  udd
D)  ttb
E)  bstF) D) and E)
G) A) and E)

Question 2

The neutron is made up of which one of the following quark combinations (up,down,strange,charm,top,bottom) ?

Accepted Answer

A)  uud
B)  ddu
C)  udd
D)  ttb
E)  bstF) A) and B)
G) A) and C) C

Question 3

What are the possible charges of a quark (not an antiquark) ?

Accepted Answer

A)  -e, 0, e
B)  -2/3 e, -1/3 e, +1/3 e, +2/3 e
C)  -2/3 e, +1/3 e
D)  -1/3 e, +2/3 e
E)  -1/3 e, +1/3 eF) A) and E)
G) A) and D)

Question 4

How many quarks are in a deuteron,  12{}^{2}_{1}12​  H?

Accepted Answer

A)  2
B)  3
C)  4
D)  6
E)  9 F) A) and E)
G) A) and D)

Question 5

Which of the following particles are not made up of quarks? (There could be more than one correct choice.)

Accepted Answer

A)  alpha particle
B)  electron
C)  proton
D)  positron
E)  neutronF) All of the above
G) B) and D)

Question 6

Which of the following statements is not true of the strong nuclear force?

Accepted Answer

A)  The nuclear force has a short range, of the order of nuclear dimensions.
B)  For two protons that are very close together, the nuclear force and the electric force have about the same magnitudes.
C)  The nuclear force does not depend on charge.
D)  A nucleon in a large nucleus interacts via the nuclear force only with nearby nucleons, not with ones far away in the nucleus.
E)  The nuclear force affects both neutrons and protons.F) All of the above
G) B) and E)

Question 7

Inside the nucleus,the weakest of the four fundamental forces is

Accepted Answer

A)  the weak nuclear force.
B)  the electromagnetic force.
C)  the gravitational force.
D)  the strong nuclear force.E) C) and D)
F) A) and B)

Question 8

Which of the following particles (or groups of particles) are made up of quarks?

Accepted Answer

A)  protons, neutrons, and electrons
B)  electrons and neutrinos
C)  photons
D)  protons and neutrons
E)  All particles except for photons are made up of quarks.F) B) and E)
G) B) and D)

Question 9

The two strongest forces that protons in a nucleus exert on each other are

Accepted Answer

A)  the weak nuclear and electromagnetic forces.
B)  the weak nuclear and the gravitational forces.
C)  the electrostatic and the gravitational forces.
D)  the strong nuclear and the electrostatic forces.E) A) and B)
F) C) and D)

Question 10

Which of the following statements about hadrons are correct? (There may be more than one correct choice.)

Accepted Answer

A)  Hadrons are composed of leptons.
B)  All hadrons are composed of quarks.
C)  All hadrons interact by the strong nuclear force.
D)  Electrons, protons, and neutrons are commonly-occurring hadrons.
E)  Protons and neutrons are hadrons, but the electron is not.F) C) and D)
G) A) and E)

Question 11

The main reason that there is a limit to the size of a stable nucleus is

Accepted Answer

A)  the limited range of the gravitational force.
B)  the short range nature of the strong nuclear force.
C)  the weakness of the gravitational force.
D)  the weakness of the electrostatic force.E) C) and D)
F) B) and D)

Question 12

How many quarks are in a tritium isotope,  13{}^{3}_{1}13​  H?

Accepted Answer

A)  2
B)  3
C)  4
D)  6
E)  9 F) A) and D)
G) B) and D)

Question 13

Inside the nucleus,the strongest of the four fundamental forces is

Accepted Answer

A)  the weak nuclear force.
B)  the electromagnetic force.
C)  the gravitational force.
D)  the strong nuclear force.E) None of the above
F) B) and D) D

Question 14

How does the range of an exchange force depend on the mass of the exchange particle?

Accepted Answer

A)  The range is longer for a massive exchange particle than for a light exchange particle.
B)  The range is shorter for a massive exchange particle than for a light exchange particle.
C)  The range does not depend on the mass of the exchange particle.D) A) and B)
E) A) and C)

Question 15

An electron and a positron,both essentially at rest,annihilate each other,emitting two identical photons in the process.What is the wavelength of these photons? The mass of an electron or positron is 9.11 × 10-31 kg.(h = 6.626 × 10-34 J ∙ s,c = 3.00 × 108 m/s)

Accepted Answer

A)  1.21 × 10-12 pm
B)  1.73 pm
C)  2.42 pm
D)  3.07 pm
E)  3.46 pmF) C) and D)
G) B) and D)

Question 16

What combination of quarks produces a proton and what are the electric charges on these quarks,expressed in terms of e?

Accepted Answer

uud,with charges +2/3 e,+2/3 e,and -1/3 e

Question 17

Which of the following particles are leptons? (There may be more than one correct choice.)

Accepted Answer

A)  protons
B)  neutrons
C)  electrons
D)  photons
E)  quarksF) None of the above
G) C) and E)

Question 18

Elementary particles that experience the weak nuclear force but not the strong nuclear force are called

Accepted Answer

A)  leptons.
B)  hadrons.
C)  mesons.
D)  bosons.
E)  baryons.F) A) and B)
G) C) and E)

Question 19

A stable nucleus contains many protons very close to each other,all positively charged.Why do the protons not fly apart due to mutual Coulomb repulsion?

Accepted Answer

A)  An attractive nuclear force in the nucleus counteracts the effect of the Coulomb forces.
B)  There are an equal number of electrons in the nucleus which neutralize the protons.
C)  The neutrons in the nucleus shield the protons from each other.
D)  The Coulomb force does not operate within nuclei.
E)  The gravity of the protons and neutrons overcomes their repulsion at such close distances.F) B) and D)
G) A) and C)

Question 20

What combination of quarks produces a neutron and what are the electric charges on these quarks,expressed in terms of e?

Accepted Answer

udd,with c...

Exam 30: Particle Physics

The proton is made up of which one of the following quark combinations (up,down,strange,charm,top,bottom) ?

Correct AnswerverifiedShow Answer

The neutron is made up of which one of the following quark combinations (up,down,strange,charm,top,bottom) ?

Correct AnswerverifiedC

What are the possible charges of a quark (not an antiquark) ?

Correct AnswerverifiedShow Answer

How many quarks are in a deuteron, 12{}^{2}_{1}12​ H?

Correct AnswerverifiedShow Answer

Which of the following particles are not made up of quarks? (There could be more than one correct choice.)

Correct AnswerverifiedShow Answer

Which of the following statements is not true of the strong nuclear force?

Correct AnswerverifiedShow Answer

Inside the nucleus,the weakest of the four fundamental forces is

Correct AnswerverifiedShow Answer

Which of the following particles (or groups of particles) are made up of quarks?

Correct AnswerverifiedShow Answer

The two strongest forces that protons in a nucleus exert on each other are

Correct AnswerverifiedShow Answer

Which of the following statements about hadrons are correct? (There may be more than one correct choice.)

Correct AnswerverifiedShow Answer

The main reason that there is a limit to the size of a stable nucleus is

Correct AnswerverifiedShow Answer

How many quarks are in a tritium isotope, 13{}^{3}_{1}13​ H?

Correct AnswerverifiedShow Answer

Inside the nucleus,the strongest of the four fundamental forces is

Correct AnswerverifiedD

How does the range of an exchange force depend on the mass of the exchange particle?

Correct AnswerverifiedShow Answer

An electron and a positron,both essentially at rest,annihilate each other,emitting two identical photons in the process.What is the wavelength of these photons? The mass of an electron or positron is 9.11 × 10-31 kg.(h = 6.626 × 10-34 J ∙ s,c = 3.00 × 108 m/s)

Correct AnswerverifiedShow Answer

What combination of quarks produces a proton and what are the electric charges on these quarks,expressed in terms of e?

Correct Answerverifieduud,with charges +2/3 e,+2/3 e,and -1/3 e

Which of the following particles are leptons? (There may be more than one correct choice.)

Correct AnswerverifiedShow Answer

Elementary particles that experience the weak nuclear force but not the strong nuclear force are called

Correct AnswerverifiedShow Answer

A stable nucleus contains many protons very close to each other,all positively charged.Why do the protons not fly apart due to mutual Coulomb repulsion?

Correct AnswerverifiedShow Answer

What combination of quarks produces a neutron and what are the electric charges on these quarks,expressed in terms of e?

Correct Answerverifiedudd,with c...View AnswerShow Answer

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C

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How many quarks are in a deuteron, ${}^{2}_{1}$ H?

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How many quarks are in a tritium isotope, ${}^{3}_{1}$ H?

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D

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An electron and a positron,both essentially at rest,annihilate each other,emitting two identical photons in the process.What is the wavelength of these photons? The mass of an electron or positron is 9.11 × 10^-31 kg.(h = 6.626 × 10^-34 J ∙ s,c = 3.00 × 10⁸ m/s)

Correct Answer
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uud,with charges +2/3 e,+2/3 e,and -1/3 e

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udd,with c...
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