Question 1

All of the following considerations provide evidence for the proton being a composite particle except

Accepted Answer

A)  high-energy electrons are deflected from the proton as if the proton contains "lumps." 
B)  high-energy particles have succeeded in fragmenting the proton into its elementary building blocks. 
C)  the predictive successes of the quark model. 
D)  Hold it! There are no exceptions. 
A)  high-energy electrons are deflected from the proton as if the proton contains "lumps." 
B)  high-energy particles have succeeded in fragmenting the proton into its elementary building blocks. 
C)  the predictive successes of the quark model. 
D)  Hold it! There are no exceptions. B

Question 2

All of the following properties of a muon and an electron have identical values except

Accepted Answer

A)  charge. 
B)  mass. 
C)  spin. 
D)  Hold it! There are no exceptions. 
A)  charge. 
B)  mass. 
C)  spin. 
D)  Hold it! There are no exceptions. B

Question 3

Examples of baryons include

Accepted Answer

A)  protons and neutrons. 
B)  electrons and muons. 
C)  neutrinos. 
D)  taus. 
A)  protons and neutrons. 
B)  electrons and muons. 
C)  neutrinos. 
D)  taus. A

Question 4

One of the largest particle accelerators in the world is located in the United States, near Chicago, and is called

Accepted Answer

A)  CERN. 
B)  Brookhaven. 
C)  SLAC. 
D)  Fermilab. 
A)  CERN. 
B)  Brookhaven. 
C)  SLAC. 
D)  Fermilab.

Question 5

All of the following conservation laws are absolute except the conservation of

Accepted Answer

A)  energy. 
B)  charge. 
C)  momentum. 
D)  Hold it! There are no exceptions. 
A)  energy. 
B)  charge. 
C)  momentum. 
D)  Hold it! There are no exceptions.

Question 6

The neutron participates in all of the following interactions except

Accepted Answer

A)  strong. 
B)  electromagnetic. 
C)  weak. 
D)  Hold it! There are no exceptions. 
A)  strong. 
B)  electromagnetic. 
C)  weak. 
D)  Hold it! There are no exceptions.

Question 7

Of the following three categories of particles, the only group that contains particles with integral values of spin is the

Accepted Answer

A)  baryons. 
B)  mesons. 
C)  leptons. 
D)  More than one of the previous responses are valid. 
A)  baryons. 
B)  mesons. 
C)  leptons. 
D)  More than one of the previous responses are valid.

Question 8

Protons and neutrons are not elementary particles. Consequently they are made from particles we call

Accepted Answer

A)  quarks. 
B)  muons. 
C)  tachyons. 
D)  baryons. 
A)  quarks. 
B)  muons. 
C)  tachyons. 
D)  baryons.

Question 9

A bubble chamber allows physicists to

Accepted Answer

A)  measure low temperatures. 
B)  measure the Sun's luminosity. 
C)  track charged particles. 
D)  detect gravitational waves. 
A)  measure low temperatures. 
B)  measure the Sun's luminosity. 
C)  track charged particles. 
D)  detect gravitational waves.

Question 10

An electron-ositron pair can annihilate with the emission of two $\gamma$-rays. A single (isolated) $\gamma$-ray cannot disappear with the creation of an electron-positron pair because

Accepted Answer

A)  momentum could not be conserved. 
B)  energy could not be conserved. 
C)  angular momentum could not be conserved. 
D)  Hold it! The premise is wrong: a single (isolated) $\gamma$-ray can disappear under the circumstances described. 
A)  momentum could not be conserved. 
B)  energy could not be conserved. 
C)  angular momentum could not be conserved. 
D)  Hold it! The premise is wrong: a single (isolated) $\gamma$-ray can disappear under the circumstances described.

Question 11

Consider two identical particles (with mass ? 0) undergoing a collision with one at rest. As the speed of the other particle increases, the fraction of its energy available for the creation of new particles

Accepted Answer

A)  increases. 
B)  remains unchanged. 
C)  decreases. 
D)  Insufficient information is given for a response that is valid in general. 
A)  increases. 
B)  remains unchanged. 
C)  decreases. 
D)  Insufficient information is given for a response that is valid in general.

Question 12

A Feynman diagram is

Accepted Answer

A)  a tool for physicists. 
B)  a model of the interactions. 
C)  a graphical representation of the particle exchange process. 
D)  all of the above. 
A)  a tool for physicists. 
B)  a model of the interactions. 
C)  a graphical representation of the particle exchange process. 
D)  all of the above.

Question 13

One of the architects in unifying the electromagnetic force with the weak force was

Accepted Answer

A)  Hubble. 
B)  Weinberg. 
C)  Gamow. 
D)  Schwinger. 
A)  Hubble. 
B)  Weinberg. 
C)  Gamow. 
D)  Schwinger.

Question 14

The only group of particles (of the three groups listed in the responses) that is not directly responsive to the strong interaction is

Accepted Answer

A)  baryons. 
B)  leptons. 
C)  mesons. 
D)  Hold it! No such generalization as proposed in the stem of this question is valid. 
A)  baryons. 
B)  leptons. 
C)  mesons. 
D)  Hold it! No such generalization as proposed in the stem of this question is valid.

Question 15

Baryons are made from how many quarks?

Accepted Answer

A)  One 
B)  Four 
C)  Three 
D)  Two 
A)  One 
B)  Four 
C)  Three 
D)  Two

Question 16

Baryons always have

Accepted Answer

A)  a +1 charge. 
B)  no spin. 
C)  no charge. 
D)  a half-spin. 
A)  a +1 charge. 
B)  no spin. 
C)  no charge. 
D)  a half-spin.

Question 17

Neutrinos are unique in that they have no charge and almost no

Accepted Answer

A)  mass. 
B)  spin. 
C)  photons. 
D)  antiparticles. 
A)  mass. 
B)  spin. 
C)  photons. 
D)  antiparticles.

Question 18

All of the following conservation laws are approximate except the conservation of

Accepted Answer

A)  isospin. 
B)  parity. 
C)  lepton number. 
D)  Hold it! There are no exceptions. 
A)  isospin. 
B)  parity. 
C)  lepton number. 
D)  Hold it! There are no exceptions.

Question 19

The range of two of the four force fields is infinite, and the range of the other two fields is finite. Therefore, the masses associated with the fields are, respectively,

Accepted Answer

A)  zero, finite. 
B)  finite, zero. 
C)  infinite, finite. 
D)  finite, infinite. 
A)  zero, finite. 
B)  finite, zero. 
C)  infinite, finite. 
D)  finite, infinite.

Question 20

Examples of mesons include

Accepted Answer

A)  electrons and neutrinos. 
B)  neutrons and protons. 
C)  protons and electrons. 
D)  kaons and pions. 
A)  electrons and neutrinos. 
B)  neutrons and protons. 
C)  protons and electrons. 
D)  kaons and pions.

Exam 41: Elementary Particles and Cosmology

All of the following considerations provide evidence for the proton being a composite particle except

All of the following properties of a muon and an electron have identical values except

Examples of baryons include

One of the largest particle accelerators in the world is located in the United States, near Chicago, and is called

All of the following conservation laws are absolute except the conservation of

The neutron participates in all of the following interactions except

Of the following three categories of particles, the only group that contains particles with integral values of spin is the

Protons and neutrons are not elementary particles. Consequently they are made from particles we call

A bubble chamber allows physicists to

An electron-ositron pair can annihilate with the emission of two γ\gammaγ -rays. A single (isolated) γ\gammaγ -ray cannot disappear with the creation of an electron-positron pair because

Consider two identical particles (with mass ? 0) undergoing a collision with one at rest. As the speed of the other particle increases, the fraction of its energy available for the creation of new particles

A Feynman diagram is

One of the architects in unifying the electromagnetic force with the weak force was

The only group of particles (of the three groups listed in the responses) that is not directly responsive to the strong interaction is

Baryons are made from how many quarks?

Baryons always have

Neutrinos are unique in that they have no charge and almost no

All of the following conservation laws are approximate except the conservation of

The range of two of the four force fields is infinite, and the range of the other two fields is finite. Therefore, the masses associated with the fields are, respectively,

Examples of mesons include

Space, Time, and Mass

Motion Along a Straight Line

Vectors

Motion in Two and Three Dimensions

Newtons Laws of Motion

Further Applications of Newtons Laws

Work and Energy

Conservation of Energy

Gravitation

Systems of Particles

Collisions

Rotation of a Rigid Body

Dynamics of a Rigid Body

Statics and Elasticity

Oscillations

Waves

Sound

Fluid Mechanics

The Ideal Gas

Heat

Thermodynamics

Electric Force and the Electric Charge

The Electric Field

Gauss Law

Electrostatic Potential and Energy

Capacitors and Dielectrics

Currents and Ohms Law

Direct Current Circuits

Magnetic Force and Field

Charges and Currents in Magnetic Fields

Electromagnetic Induction

Alternating Current Circuits

Electromagnetic Waves

Reflection, Refraction, and Optics

Interference and Diffraction

The Theory of Special Relativity

Quanta of Light

Spectral Lines, Bohrs Theory, and Quantum Mechanics

Quantum Structure of Atoms, Molecules, and Solids

Nuclei

Filters

An electron-ositron pair can annihilate with the emission of two $\gamma$ -rays. A single (isolated) $\gamma$ -ray cannot disappear with the creation of an electron-positron pair because