Question 1

Particles composed of quarks are

Accepted Answer

A)  photons.
B)  leptons.
C)  neutrinos.
D)  W and Z bosons.
E)  baryons and mesons.F) B) and C)
G) A) and E)

Question 2

The law of conservation of baryon number is that

Accepted Answer

A)  the total number of baryons and leptons is conserved.
B)  the total number of baryons is conserved.
C)  the (number of baryons) − (number of antibaryons) is conserved.
D)  the total number of quarks is conserved.
E)  the (number of baryons) + (number of antibaryons) is conserved.F) B) and E)
G) B) and C)

Question 3

The particle Δ++ has an electric charge twice that of the proton and baryon number +1.Strangeness,charm,bottomness and topness are all 0.Its quark composition must be

Accepted Answer

A)  uuu.
B)  uud.
C)  udd.
D)   ++ has an electric charge twice that of the proton and baryon number +1.Strangeness,charm,bottomness and topness are all 0.Its quark composition must be 
A)  uuu. 
B)  uud. 
C)  udd. 
D)     . 
E)     . " class="answers-bank-image d-inline" rel="preload" > .
E)   ++ has an electric charge twice that of the proton and baryon number +1.Strangeness,charm,bottomness and topness are all 0.Its quark composition must be 
A)  uuu. 
B)  uud. 
C)  udd. 
D)     . 
E)     . " class="answers-bank-image d-inline" rel="preload" > .F) B) and C)
G) None of the above

Question 4

In this course we have seen that baryons have inertial and gravitational mass,intrinsic angular momentum,and other internal properties that have been given names like baryon number,strangeness,charm,etc.The Standard Model's explanation for these properties of baryons is that

Accepted Answer

A)  the baryons are states of something more elementary that can exist in multiple quantum states.
B)  the leptons are states of something more elementary that can exist in multiple quantum states.
C)  photons are states of something more elementary that can exist in multiple quantum states.
D)  according to the Heisenberg Uncertainty Principle quantum numbers are indeterminate.
E)  quarks are states of something more elementary that can exist in multiple quantum states.F) A) and E)
G) C) and D)

Question 5

A proton and an antiproton each with total energy of 400 GeV collide head-on.What is the total energy (particles + energy) released?

Accepted Answer

A)  zero
B)  400 Gev
C)  800 GeV
D)  1 600 GeV
E)  2 400 GeVF) A) and C)
G) A) and B)

Question 6

A photon with an energy of Eγ = 2.090 0 GeV creates a proton-antiproton pair in which the proton has a kinetic energy of 95.0 MeV.What is the kinetic energy of the antiproton? (mpc2 = 938.3 MeV)

Accepted Answer

Question 7

Which of the following particle reactions cannot occur?

Accepted Answer

A)  p + p → p + p + p + + + p → K+ + Σ+ 
D)  γ + p → n + π0 
E)  e− + e+ → 2γ " class="answers-bank-image d-inline" rel="preload" >
B)  p + + + p → K+ + Σ+ 
D)  γ + p → n + π0 
E)  e− + e+ → 2γ " class="answers-bank-image d-inline" rel="preload" > → 2γ
C)  π+ + p → K+ + Σ+
D)  γ + p → n + π0
E)  e− + e+ → 2γF) A) and B)
G) A) and C)

Question 8

Which of the following reactions violates conservation of strangeness?

Accepted Answer

A)  Ω− → 3γ
B)   − → 3γ 
B)     
C)     
D)     
E)     " class="answers-bank-image d-inline" rel="preload" >
C)   − → 3γ 
B)     
C)     
D)     
E)     " class="answers-bank-image d-inline" rel="preload" >
D)   − → 3γ 
B)     
C)     
D)     
E)     " class="answers-bank-image d-inline" rel="preload" >
E)   − → 3γ 
B)     
C)     
D)     
E)     " class="answers-bank-image d-inline" rel="preload" >F) B) and D)
G) D) and E)

Question 9

The decay e is not conserved. B) Lμ is not conserved. C) quark number is not conserved. D) all of the above are not conserved. E) only Le and Lμ are not conserved. " class="answers-bank-image d-inline" rel="preload" >
Is not possible because

Accepted Answer

A)  Le is not conserved.
B)  Lμ is not conserved.
C)  quark number is not conserved.
D)  all of the above are not conserved.
E)  only Le and Lμ are not conserved.F) A) and E)
G) A) and C)

Question 10

A Σ+ particle,composed of uus quarks,has the same ____ as a proton.

Accepted Answer

A)  baryon number and charm.
B)  baryon number and electric charge.
C)  baryon number and strangeness.
D)  baryon number,electric charge,and charm.
E)  electric charge and strangeness.F) B) and E)
G) B) and D)

Question 11

Calculate the range of the force that might be produced by the virtual exchange of a proton.(mp = 1.67 × 10−27 kg,h = 6.626 × 10−34 J ⋅ s)

Accepted Answer

Question 12

Of the following leptons,which has the greatest rest energy?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) C) and D)
G) B) and D)

Question 13

The acceleration (or deceleration) of the expansion of the universe is determined by

Accepted Answer

A)  the standard matter,baryons and leptons.
B)  the dark matter in the universe.
C)  the dark energy in the universe.
D)  all of the above.
E)  only (b) and (c) above.F) B) and D)
G) A) and B)

Question 14

If a K0 meson at rest decays in 0.89 × 10−10 s,how far will a K0 meson moving at 0.96 c travel through a bubble chamber?

Accepted Answer

A)  17 cm
B)  1.1 cm
C)  53 cm
D)  42 mm
E)  9.2 cmF) B) and C)
G) B) and D)

Exam 46: Particle Physics and Cosmology

If a K⁰ meson at rest decays in 0.89 × 10−¹⁰ s,how far will a K⁰ meson moving at 0.96 c travel through a bubble chamber?

Correct Answer
verified

In this course we have seen that baryons have inertial and gravitational mass,intrinsic angular momentum,and other internal properties that have been given names like baryon number,strangeness,charm,etc.The Standard Model's explanation for these properties of baryons is that

Correct Answer
verified

A photon with an energy of Eγ = 2.090 0 GeV creates a proton-antiproton pair in which the proton has a kinetic energy of 95.0 MeV.What is the kinetic energy of the antiproton? (m_pc² = 938.3 MeV)

Correct Answer
verified

A proton and an antiproton each with total energy of 400 GeV collide head-on.What is the total energy (particles + energy) released?

Correct Answer
verified

Of the following leptons,which has the greatest rest energy?

Correct Answer
verified

The acceleration (or deceleration) of the expansion of the universe is determined by

Correct Answer
verified

The particle Δ⁺⁺ has an electric charge twice that of the proton and baryon number +1.Strangeness,charm,bottomness and topness are all 0.Its quark composition must be

Correct Answer
verified

Calculate the range of the force that might be produced by the virtual exchange of a proton.(m_p = 1.67 × 10−²⁷ kg,h = 6.626 × 10−³⁴ J ⋅ s)

Correct Answer
verified

The law of conservation of baryon number is that

Correct Answer
verified

Particles composed of quarks are

Correct Answer
verified

The decay Is not possible because

Correct Answer
verified

Which of the following reactions violates conservation of strangeness?

Correct Answer
verified

A Σ⁺ particle,composed of uus quarks,has the same ____ as a proton.

Correct Answer
verified

Which of the following particle reactions cannot occur?

Correct Answer
verified

Exam 46: Particle Physics and Cosmology

If a K0 meson at rest decays in 0.89 × 10−10 s,how far will a K0 meson moving at 0.96 c travel through a bubble chamber?

Correct AnswerverifiedShow Answer

In this course we have seen that baryons have inertial and gravitational mass,intrinsic angular momentum,and other internal properties that have been given names like baryon number,strangeness,charm,etc.The Standard Model's explanation for these properties of baryons is that

Correct AnswerverifiedShow Answer

A photon with an energy of Eγ = 2.090 0 GeV creates a proton-antiproton pair in which the proton has a kinetic energy of 95.0 MeV.What is the kinetic energy of the antiproton? (mpc2 = 938.3 MeV)

Correct AnswerverifiedShow Answer

A proton and an antiproton each with total energy of 400 GeV collide head-on.What is the total energy (particles + energy) released?

Correct AnswerverifiedShow Answer

Of the following leptons,which has the greatest rest energy?

Correct AnswerverifiedShow Answer

The acceleration (or deceleration) of the expansion of the universe is determined by

Correct AnswerverifiedShow Answer

The particle Δ++ has an electric charge twice that of the proton and baryon number +1.Strangeness,charm,bottomness and topness are all 0.Its quark composition must be

Correct AnswerverifiedShow Answer

Calculate the range of the force that might be produced by the virtual exchange of a proton.(mp = 1.67 × 10−27 kg,h = 6.626 × 10−34 J ⋅ s)

Correct AnswerverifiedShow Answer

The law of conservation of baryon number is that

Correct AnswerverifiedShow Answer

Particles composed of quarks are

Correct AnswerverifiedShow Answer

The decay Is not possible because

Correct AnswerverifiedShow Answer

Which of the following reactions violates conservation of strangeness?

Correct AnswerverifiedShow Answer

A Σ+ particle,composed of uus quarks,has the same ____ as a proton.

Correct AnswerverifiedShow Answer

Which of the following particle reactions cannot occur?

Correct AnswerverifiedShow Answer

If a K⁰ meson at rest decays in 0.89 × 10−¹⁰ s,how far will a K⁰ meson moving at 0.96 c travel through a bubble chamber?

Correct Answer
verified

Correct Answer
verified

A photon with an energy of Eγ = 2.090 0 GeV creates a proton-antiproton pair in which the proton has a kinetic energy of 95.0 MeV.What is the kinetic energy of the antiproton? (m_pc² = 938.3 MeV)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The particle Δ⁺⁺ has an electric charge twice that of the proton and baryon number +1.Strangeness,charm,bottomness and topness are all 0.Its quark composition must be

Correct Answer
verified

Calculate the range of the force that might be produced by the virtual exchange of a proton.(m_p = 1.67 × 10−²⁷ kg,h = 6.626 × 10−³⁴ J ⋅ s)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A Σ⁺ particle,composed of uus quarks,has the same ____ as a proton.

Correct Answer
verified

Correct Answer
verified