Question 1

Which of the following are possible combinations of quarks?

Accepted Answer

A) 1,2,3,5,6 
B) 1,3,5, 
C) 2,3,5 
D) 2,3,4 
E) 2,3,4,6 
A) 1,2,3,5,6 
B) 1,3,5, 
C) 2,3,5 
D) 2,3,4 
E) 2,3,4,6

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

Which of the following are possible combinations of quarks?

Accepted Answer

A) 1,2,3,5,6 
B) 1,3,5,6 
C) 2,3,5,6 
D) 1,3,4,5 
E) 1,3,4,5,6 
A) 1,2,3,5,6 
B) 1,3,5,6 
C) 2,3,5,6 
D) 1,3,4,5 
E) 1,3,4,5,6

Question 4

Particles that have zero spin or integral spin

Accepted Answer

A) are called bosons. 
B) are called fermions. 
C) must be in different quantum states. 
D) include protons,neutrons,and neutrinos. 
E) None of these is correct. 
A) are called bosons. 
B) are called fermions. 
C) must be in different quantum states. 
D) include protons,neutrons,and neutrinos. 
E) None of these is correct.

Question 5

The reaction e+ + e- $\to$ $\gamma$ + $\gamma$

Accepted Answer

A) describes the annihilation of a positron. 
B) has a large probability of occurrence only if the positron is at rest or nearly at rest. 
C) requires two photons moving in opposite directions to conserve linear momentum. 
D) is an electron-positron reaction. 
E) All of these are correct. 
A) describes the annihilation of a positron. 
B) has a large probability of occurrence only if the positron is at rest or nearly at rest. 
C) requires two photons moving in opposite directions to conserve linear momentum. 
D) is an electron-positron reaction. 
E) All of these are correct.

Question 6

How far is a galaxy from Earth if it is receding from Earth at a speed of 0.1c?

Accepted Answer

A) 3.0 $\times$ 1020 m 
B) 1.0 $\times$ 1022 m 
C) 1.2 $\times$ 1025 m 
D) 3.0 $\times$ 1028 m 
E) 1.0 $\times$ 1030 m 
A) 3.0 $\times$ 1020 m 
B) 1.0 $\times$ 1022 m 
C) 1.2 $\times$ 1025 m 
D) 3.0 $\times$ 1028 m 
E) 1.0 $\times$ 1030 m

Question 7

In quantum electrodynamics (QED),the electromagnetic field is described in terms of

Accepted Answer

A) the interaction of electrons. 
B) hadrons. 
C) action at a distance. 
D) the weak nuclear interaction. 
E) the interaction of photons. 
A) the interaction of electrons. 
B) hadrons. 
C) action at a distance. 
D) the weak nuclear interaction. 
E) the interaction of photons.

Question 8

The conservation law violated by the reaction p $\to$ $\pi$0 + e+ is the conservation of

Accepted Answer

A) charge. 
B) energy. 
C) linear momentum. 
D) lepton number and baryon number. 
E) angular momentum. 
A) charge. 
B) energy. 
C) linear momentum. 
D) lepton number and baryon number. 
E) angular momentum.

Question 9

The numbers L = +1 and B = +1 describe

Accepted Answer

A) a particle other than a lepton,a baryon,or an antibaryon. 
B) a lepton and an antibaryon. 
C) an antilepton and a baryon. 
D) an antilepton and an antibaryon. 
E) a lepton and a baryon. 
A) a particle other than a lepton,a baryon,or an antibaryon. 
B) a lepton and an antibaryon. 
C) an antilepton and a baryon. 
D) an antilepton and an antibaryon. 
E) a lepton and a baryon.

Question 10

The Stanford Linear Accelerator Center (SLAC)can accelerate electrons to an energy of 50 GeV.The wavelength of these electrons is of the order

Accepted Answer

A) 0.2 fm 
B) 0.02 fm 
C) 0.002 fm 
D) 0.006 fm 
E) 0.008 fm 
A) 0.2 fm 
B) 0.02 fm 
C) 0.002 fm 
D) 0.006 fm 
E) 0.008 fm

Question 11

The numbers L = 0 and B = 0 describe

Accepted Answer

A) a particle other than a lepton or a baryon. 
B) a lepton and an antibaryon. 
C) an antilepton and a baryon. 
D) an antilepton and an antibaryon. 
E) a lepton and a baryon. 
A) a particle other than a lepton or a baryon. 
B) a lepton and an antibaryon. 
C) an antilepton and a baryon. 
D) an antilepton and an antibaryon. 
E) a lepton and a baryon.

Question 12

Hubble's Law relates the speed of a galaxy from its distance to us.If you assume Hubble's constant to be 23 km/s/106 c · y,then what is the distance of a galaxy that is traveling at 10% the speed of light away from us?

Accepted Answer

A) It is not possible for a galaxy to travel so fast! 
B) 1.3 $\times$ 1010 c · y 
C) 1.3 $\times$ 109 c · y 
D) 1.3 $\times$ 1011 c · y 
E) 1.3 $\times$ 108 c · y 
A) It is not possible for a galaxy to travel so fast! 
B) 1.3 $\times$ 1010 c · y 
C) 1.3 $\times$ 109 c · y 
D) 1.3 $\times$ 1011 c · y 
E) 1.3 $\times$ 108 c · y

Question 13

The distance to a particular galaxy is 60 million light years.If you assume Hubble's constant to be 23 km/s/106 c · y,then what redshift recession velocity would you expect to measure?

Accepted Answer

A) zero 
B) 1.4 $\times$ 103 km/s 
C) 2.6 $\times$ 103 km/s 
D) 0.38 $\times$ 103 km/s 
E) None of these is correct. 
A) zero 
B) 1.4 $\times$ 103 km/s 
C) 2.6 $\times$ 103 km/s 
D) 0.38 $\times$ 103 km/s 
E) None of these is correct.

Question 14

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 15

The scientific community now thinks that

Accepted Answer

A) the universe was formed in an explosion that took place between 10 and 15 billion years ago. 
B) new matter is continuously being created in the space between the galaxies. 
C) the universe is collapsing. 
D) quasars originated in the nucleus of the Milky Way. 
E) our Sun is at the center of the universe. 
A) the universe was formed in an explosion that took place between 10 and 15 billion years ago. 
B) new matter is continuously being created in the space between the galaxies. 
C) the universe is collapsing. 
D) quasars originated in the nucleus of the Milky Way. 
E) our Sun is at the center of the universe.

Question 16

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 17

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 18

The charge of the particle   is

Accepted Answer

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

Question 19

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 20

Particles that participate in the weak interaction but not the strong 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

Exam 41: Elementary Particles and the Beginning of the Universe

Which of the following are possible combinations of quarks?

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

Which of the following are possible combinations of quarks?

Particles that have zero spin or integral spin

The reaction e+ + e- →\to→ γ\gammaγ + γ\gammaγ

How far is a galaxy from Earth if it is receding from Earth at a speed of 0.1c?

In quantum electrodynamics (QED),the electromagnetic field is described in terms of

The conservation law violated by the reaction p →\to→ π\piπ 0 + e+ is the conservation of

The numbers L = +1 and B = +1 describe

The Stanford Linear Accelerator Center (SLAC)can accelerate electrons to an energy of 50 GeV.The wavelength of these electrons is of the order

The numbers L = 0 and B = 0 describe

Hubble's Law relates the speed of a galaxy from its distance to us.If you assume Hubble's constant to be 23 km/s/106 c · y,then what is the distance of a galaxy that is traveling at 10% the speed of light away from us?

The distance to a particular galaxy is 60 million light years.If you assume Hubble's constant to be 23 km/s/106 c · y,then what redshift recession velocity would you expect to measure?

The charge of the particle dds is

The scientific community now thinks that

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

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

The charge of the particle is

In the standard model,

Particles that participate in the weak interaction but not the strong interaction are called

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

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 e⁺ + e^- $\to$ $\gamma$ + $\gamma$

The conservation law violated by the reaction p $\to$ $\pi$ ⁰ + e⁺ is the conservation of

Hubble's Law relates the speed of a galaxy from its distance to us.If you assume Hubble's constant to be 23 km/s/10⁶ c · y,then what is the distance of a galaxy that is traveling at 10% the speed of light away from us?

The distance to a particular galaxy is 60 million light years.If you assume Hubble's constant to be 23 km/s/10⁶ c · y,then what redshift recession velocity would you expect to measure?