Question 1

In the standard model,

Accepted Answer

A)  the fundamental particles are the leptons and quarks. 
B)  the force carriers are the photon, the W±, the Z particles, and the gluons. 
C)  every force in nature is due to the strong, electromagnetic, weak, or gravitational force. 
D)  a particle experiences one of the basic interactions if it carries a charge associated with that interaction. 
E)  All of these are correct. 
A)  the fundamental particles are the leptons and quarks. 
B)  the force carriers are the photon, the W±, the Z particles, and the gluons. 
C)  every force in nature is due to the strong, electromagnetic, weak, or gravitational force. 
D)  a particle experiences one of the basic interactions if it carries a charge associated with that interaction. 
E)  All of these are correct.

Question 2

The interaction that describes the forces among nucleons that hold nuclei together is

Accepted Answer

A)  the strong nuclear (hadronic) interaction. 
B)  the electromagnetic interaction. 
C)  the weak nuclear interaction. 
D)  the gravitational interaction. 
E)  None of these is correct. 
A)  the strong nuclear (hadronic) interaction. 
B)  the electromagnetic interaction. 
C)  the weak nuclear interaction. 
D)  the gravitational interaction. 
E)  None of these is correct.

Question 3

A possible explanation for the fact that an isolated quark has yet to be found is that

Accepted Answer

A)  the force between quarks varies inversely with their separation. 
B)  the potential energy of the quarks decreases with their separation. 
C)  the force between quarks is independent of their separation. 
D)  the force between quarks varies inversely with the square of their separation. 
E)  None of these is correct. 
A)  the force between quarks varies inversely with their separation. 
B)  the potential energy of the quarks decreases with their separation. 
C)  the force between quarks is independent of their separation. 
D)  the force between quarks varies inversely with the square of their separation. 
E)  None of these is correct.

Question 4

Particles that decay via the weak interaction have lifetimes of the order of

Accepted Answer

A)  10-10 s 
B)  10-15 s 
C)  10-20 s 
D)  10-23 s 
E)  10-27 s 
A)  10-10 s 
B)  10-15 s 
C)  10-20 s 
D)  10-23 s 
E)  10-27 s

Question 5

The charge of the d quark is

Accepted Answer

A)  e 
B)  (-1/3)e 
C)  (2/3)e 
D)  (-2/3)e 
E)  (1/3)e 
A)  e 
B)  (-1/3)e 
C)  (2/3)e 
D)  (-2/3)e 
E)  (1/3)e

Question 6

The reaction $\mu$- $\rightarrow$e- +$ \bar{v}_{\mathrm{e}} $ + $\nu $$\mu$ conserves

Accepted Answer

A)  muon lepton number but not electron lepton number. 
B)  electron lepton number but not muon lepton number. 
C)  neither muon lepton nor electron lepton number. 
D)  both muon and electron lepton numbers. 
E)  None of these is correct. 
A)  muon lepton number but not electron lepton number. 
B)  electron lepton number but not muon lepton number. 
C)  neither muon lepton nor electron lepton number. 
D)  both muon and electron lepton numbers. 
E)  None of these is correct.

Question 7

The charge of the s quark is

Accepted Answer

A)  e 
B)  (-1/3)e 
C)  (2/3)e 
D)  (-2/3)e 
E)  (1/3)e 
A)  e 
B)  (-1/3)e 
C)  (2/3)e 
D)  (-2/3)e 
E)  (1/3)e

Question 8

In the present understanding of the behavior of elementary particles, the term color is used to denote

Accepted Answer

A)  the wavelengths of various $\gamma$ rays emitted by the particles. 
B)  a property responsible for the strong forces between quarks. 
C)  a property that distinguishes between protons and neutrons. 
D)  a property that only leptons can possess. 
E)  nothing. 
A)  the wavelengths of various $\gamma$ rays emitted by the particles. 
B)  a property responsible for the strong forces between quarks. 
C)  a property that distinguishes between protons and neutrons. 
D)  a property that only leptons can possess. 
E)  nothing.

Question 9

The cosmic background radiation is an important aspect of the Big Bang theory because it

Accepted Answer

A)  shows that evolutionary models of the universe are incorrect. 
B)  does not show any redshift. 
C)  could not be produced in the universe as it is now, which suggests that conditions must have been different in the past. 
D)  discredits Hubble's law. 
E)  is useful in identifying the locations of important objects in the universe. 
A)  shows that evolutionary models of the universe are incorrect. 
B)  does not show any redshift. 
C)  could not be produced in the universe as it is now, which suggests that conditions must have been different in the past. 
D)  discredits Hubble's law. 
E)  is useful in identifying the locations of important objects in the universe.

Question 10

A conservation law that is not universal but applies only to certain kinds of interactions is conservation of

Accepted Answer

A)  lepton number 
B)  baryon number 
C)  spin 
D)  charge 
E)  strangeness 
A)  lepton number 
B)  baryon number 
C)  spin 
D)  charge 
E)  strangeness

Question 11

The field quanta that mediate the weak nuclear force are

Accepted Answer

A)  photons 
B)  gravitons 
C)  GUTs 
D)  gluons 
E)  weak vector bosons 
A)  photons 
B)  gravitons 
C)  GUTs 
D)  gluons 
E)  weak vector bosons

Question 12

Particles that decay via the strong interaction have lifetimes of the order of

Accepted Answer

A)  10-10 s 
B)  10-15 s 
C)  10-20 s 
D)  10-23 s 
E)  10-27 s 
A)  10-10 s 
B)  10-15 s 
C)  10-20 s 
D)  10-23 s 
E)  10-27 s

Question 13

Hubble's law can be interpreted to tell us the approximate

Accepted Answer

A)  angular speed of the Milky Way. 
B)  temperature of our Sun. 
C)  force of gravity at any point in space. 
D)  age of the universe. 
E)  mass of Earth. 
A)  angular speed of the Milky Way. 
B)  temperature of our Sun. 
C)  force of gravity at any point in space. 
D)  age of the universe. 
E)  mass of Earth.

Question 14

Particles that participate in the strong nuclear interaction are called

Accepted Answer

A)  neutrinos 
B)  hadrons 
C)  leptons 
D)  electrons 
E)  photons 
A)  neutrinos 
B)  hadrons 
C)  leptons 
D)  electrons 
E)  photons

Question 15

The Starship Enterprise is powered by combining matter with antimatter. Suppose 1 kg of each are combined and ejected backwards at the speed of light, what is the final speed of the Enterprise starting from rest? Assume that the mass of the Enterprise is 10,000 kg and the spaceship does not reach relativistic speed.

Accepted Answer

A)  c/100 
B)  c/500 
C)  c/2000 
D)  c/5000 
E)  c/10000 
A)  c/100 
B)  c/500 
C)  c/2000 
D)  c/5000 
E)  c/10000

Question 16

We think that the universe is expanding because

Accepted Answer

A)  the light from distant galaxies is very faint. 
B)  the light from distant galaxies is very bright. 
C)  distant galaxies are very small. 
D)  the light from distant galaxies is blueshifted. 
E)  the light from distant galaxies is redshifted. 
A)  the light from distant galaxies is very faint. 
B)  the light from distant galaxies is very bright. 
C)  distant galaxies are very small. 
D)  the light from distant galaxies is blueshifted. 
E)  the light from distant galaxies is redshifted.

Question 17

Which of the following statements about particles and their interactions is true?

Accepted Answer

A)  All particles that carry electric charge participate in the electromagnetic interaction. 
B)  All particles participate in gravity. 
C)  Some particles participate in all four interactions, whereas others participate in only some of them. 
D)  The strong nuclear interaction is also known as the hadronic interaction. 
E)  All of these are correct. 
A)  All particles that carry electric charge participate in the electromagnetic interaction. 
B)  All particles participate in gravity. 
C)  Some particles participate in all four interactions, whereas others participate in only some of them. 
D)  The strong nuclear interaction is also known as the hadronic interaction. 
E)  All of these are correct.

Question 18

What is baryon number, electric charge (in units of e), and strangeness for the three quark combination uuu?

Accepted Answer

A)  1, -2, 0 
B)  1, -1, 0 
C)  1, +2, 0 
D)  1, +1, 0 
E)  none of the above 
A)  1, -2, 0 
B)  1, -1, 0 
C)  1, +2, 0 
D)  1, +1, 0 
E)  none of the above

Question 19

The charge of the particle dds is

Accepted Answer

A)  e 
B)  (1/3)e 
C)  (-2/3)e 
D)  -e 
E)  zero 
A)  e 
B)  (1/3)e 
C)  (-2/3)e 
D)  -e 
E)  zero

Question 20

Molecular forces and most of the everyday forces we observe among macroscopic objects are best understood in terms of

Accepted Answer

A)  the strong nuclear (hadronic) interaction. 
B)  the electromagnetic interaction. 
C)  the weak nuclear interaction. 
D)  the gravitational interaction. 
E)  None of these is correct. 
A)  the strong nuclear (hadronic) interaction. 
B)  the electromagnetic interaction. 
C)  the weak nuclear interaction. 
D)  the gravitational interaction. 
E)  None of these is correct.

In the standard model,

The interaction that describes the forces among nucleons that hold nuclei together is

A possible explanation for the fact that an isolated quark has yet to be found is that

Particles that decay via the weak interaction have lifetimes of the order of

The charge of the d quark is

The reaction $\mu$ ^- $\rightarrow$ e^- + $\bar{v}_{\mathrm{e}}$ + $\nu$ _$\mu$ conserves

The charge of the s quark is

In the present understanding of the behavior of elementary particles, the term color is used to denote

The cosmic background radiation is an important aspect of the Big Bang theory because it

A conservation law that is not universal but applies only to certain kinds of interactions is conservation of

The field quanta that mediate the weak nuclear force are

Particles that decay via the strong interaction have lifetimes of the order of

Hubble's law can be interpreted to tell us the approximate

Particles that participate in the strong nuclear interaction are called

We think that the universe is expanding because

Which of the following statements about particles and their interactions is true?

What is baryon number, electric charge (in units of e), and strangeness for the three quark combination uuu?

The charge of the particle dds is

Molecular forces and most of the everyday forces we observe among macroscopic objects are best understood in terms of

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Filters

Exam 21: Elementary Particles and the Beginning of the Universe

In the standard model,

The interaction that describes the forces among nucleons that hold nuclei together is

A possible explanation for the fact that an isolated quark has yet to be found is that

Particles that decay via the weak interaction have lifetimes of the order of

The charge of the d quark is

The reaction μ\muμ - →\rightarrow→ e- + vˉe \bar{v}_{\mathrm{e}} vˉe​ + ν\nu ν μ\muμ conserves

The charge of the s quark is

In the present understanding of the behavior of elementary particles, the term color is used to denote

The cosmic background radiation is an important aspect of the Big Bang theory because it

A conservation law that is not universal but applies only to certain kinds of interactions is conservation of

The field quanta that mediate the weak nuclear force are

Particles that decay via the strong interaction have lifetimes of the order of

Hubble's law can be interpreted to tell us the approximate

Particles that participate in the strong nuclear interaction are called

We think that the universe is expanding because

Which of the following statements about particles and their interactions is true?

What is baryon number, electric charge (in units of e), and strangeness for the three quark combination uuu?

The charge of the particle dds is

Molecular forces and most of the everyday forces we observe among macroscopic objects are best understood in terms of

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Filters

The reaction $\mu$ ^- $\rightarrow$ e^- + $\bar{v}_{\mathrm{e}}$ + $\nu$ _$\mu$ conserves