Question 1

Theoretical physicists have had the least success in combining which force with the electromagnetic force?

Accepted Answer

A)  strong nuclear force 
B)  weak nuclear force 
C)  gravitational force 
D)  electrical Coulomb force 
A)  strong nuclear force 
B)  weak nuclear force 
C)  gravitational force 
D)  electrical Coulomb force C

Question 2

Which particle was the last to be discovered?

Accepted Answer

A)  electron 
B)  neutrino 
C)  neutron 
D)  proton 
A)  electron 
B)  neutrino 
C)  neutron 
D)  proton B

Question 3

When comparing product nuclei to reactant nuclei in an exothermal nuclear fusion process,which has the greater binding energy per nucleon?

Accepted Answer

A)  greater in product nuclei 
B)  greater in reactant nuclei 
C)  equal in both product and reactant nuclei 
D)  None of the above choices are valid. 
A)  greater in product nuclei 
B)  greater in reactant nuclei 
C)  equal in both product and reactant nuclei 
D)  None of the above choices are valid. A

Question 4

Baryons are composed of 3 quarks.If all 3-quark compositions of particles could happen,what would be the highest possible charge for such a particle?

Accepted Answer

A)  1 e 
B)  2 e 
C)  3 e 
D)  There is no upper limit,though the charge is usually less than 3 
A)  1 e 
B)  2 e 
C)  3 e 
D)  There is no upper limit,though the charge is usually less than 3

Question 5

The microwave background radiation:

Accepted Answer

A)  represents the leftover glow from the Big Bang. 
B)  was discovered by Penzias and Wilson. 
C)  had its slight non-uniformity measured by COBE. 
D)  All of the above. 
A)  represents the leftover glow from the Big Bang. 
B)  was discovered by Penzias and Wilson. 
C)  had its slight non-uniformity measured by COBE. 
D)  All of the above.

Question 6

When considering the law of conservation of lepton number for a reaction,how many different lepton numbers must be checked?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  6 
A)  1 
B)  2 
C)  3 
D)  6

Question 7

Assume that (i)the energy released per fission event of 235U is 194 MeV,and (ii)33% of the nuclear energy released in a power plant is ultimately converted to usable electrical energy.Approximately how many fission events will occur in one second in order to provide the two GW electrical power output of a typical power plant? (1 eV = 1.6 × 10−19 J)

Accepted Answer

A)  4E+23 fission/s 
B)  2E+20 fission/s 
C)  6E+25 fission/s 
D)  2E+15 fission/s 
E)  ​8E+17 fission/s 
A)  4E+23 fission/s 
B)  2E+20 fission/s 
C)  6E+25 fission/s 
D)  2E+15 fission/s 
E)  ​8E+17 fission/s

Question 8

What characteristic is preferred in the elements contained in moderator materials when used in a nuclear fission reactor?

Accepted Answer

A)  low atomic mass 
B)  metallic 
C)  non-metallic 
D)  high atomic mass 
A)  low atomic mass 
B)  metallic 
C)  non-metallic 
D)  high atomic mass

Question 9

If a negative muon decays to form an electron-antineutrino pair and one other particle,the other particle may be a(n):

Accepted Answer

A)  positron. 
B)  antineutrino. 
C)  mu neutrino. 
D)  electron. 
A)  positron. 
B)  antineutrino. 
C)  mu neutrino. 
D)  electron.

Question 10

Which of the following is not a meson?

Accepted Answer

A)  the muon 
B)  the pion 
C)  the kaon 
D)  All of the above are mesons. 
A)  the muon 
B)  the pion 
C)  the kaon 
D)  All of the above are mesons.

Question 11

The spin of all quarks is:

Accepted Answer

A)  0. 
B)  1/2. 
C)  1. 
D)  1/3 or 2/3. 
A)  0. 
B)  1/2. 
C)  1. 
D)  1/3 or 2/3.

Question 12

A positron and an electron differ in:

Accepted Answer

A)  charge. 
B)  mass. 
C)  spin. 
D)  energy. 
A)  charge. 
B)  mass. 
C)  spin. 
D)  energy.

Question 13

In a fusion reactor,the high temperature of the order of 108 K is required in order that what condition is met?

Accepted Answer

A)  melt down the hydrogen fuel 
B)  strip the hydrogen atoms of their electrons 
C)  break the protons into their elementary particle sub-parts 
D)  overcome Coulomb repelling forces between protons 
A)  melt down the hydrogen fuel 
B)  strip the hydrogen atoms of their electrons 
C)  break the protons into their elementary particle sub-parts 
D)  overcome Coulomb repelling forces between protons

Question 14

How much kinetic energy must a deuterium ion (charge =1.6 x 10-19 C) have to approach within 1.6 × 10−14 m of another deuterium ion? ( ke =8.99 x 109 N. m2/ C2) And 1 keV=1.6 x 10-16J)

Accepted Answer

A)  60 keV 
B)  110 keV 
C)  10 keV 
D)  90 keV 
E)  ​140 keV 
A)  60 keV 
B)  110 keV 
C)  10 keV 
D)  90 keV 
E)  ​140 keV

Question 15

The pion (mπ = 140 MeV/c2)is thought to be the particle exchanged in the nuclear force.What is the maximum range of this particle if its "time of existence" is as long as can be allowed by the uncertainty principle ΔE⋅Δt = h/2π? (h/2π = 1.05 × 10−34 J⋅s,c = 3.00 × 108 m/s,and 1 eV = 1.6 × 10−19 J)

Accepted Answer

A)  1.2 × 10−15 m 
B)  1.4 × 10−15 m 
C)  2.0 × 10−15 m 
D)  7.5 × 10−15 m 
A)  1.2 × 10−15 m 
B)  1.4 × 10−15 m 
C)  2.0 × 10−15 m 
D)  7.5 × 10−15 m

Question 16

The law of conservation of strangeness tells us that strangeness is not conserved for which of the following interactions?

Accepted Answer

A)  strong 
B)  electromagnetic 
C)  weak 
D)  All three of the above interactions conserve strangeness. 
A)  strong 
B)  electromagnetic 
C)  weak 
D)  All three of the above interactions conserve strangeness.

Question 17

If a self-sustained controlled fusion reaction is to operate,a condition which must be met is that the fuel material be subjected to which of the following condition(s)?

Accepted Answer

A)  confined for sufficient time period 
B)  have sufficiently high density 
C)  be at sufficiently high temperature 
D)  All of the above choices are valid. 
A)  confined for sufficient time period 
B)  have sufficiently high density 
C)  be at sufficiently high temperature 
D)  All of the above choices are valid.

Question 18

The reason that a thermonuclear fusion reaction cannot be maintained in the oceans of the earth is because:

Accepted Answer

A)  the temperature is not high enough. 
B)  the density is not high enough. 
C)  there is insufficient deuterium in the ocean. 
D)  the deuterium in the ocean is not radioactive. 
A)  the temperature is not high enough. 
B)  the density is not high enough. 
C)  there is insufficient deuterium in the ocean. 
D)  the deuterium in the ocean is not radioactive.

Question 19

The cosmic background radiation appears compatible with a blackbody source at what temperature?

Accepted Answer

A)  0.000 3 K 
B)  0.03 K 
C)  3 K 
D)  300 K 
A)  0.000 3 K 
B)  0.03 K 
C)  3 K 
D)  300 K

Question 20

If a photon produces an electron-positron pair and one other particle,the other particle may be a(n):

Accepted Answer

A)  muon. 
B)  antineutrino. 
C)  neutrino. 
D)  photon. 
A)  muon. 
B)  antineutrino. 
C)  neutrino. 
D)  photon.

Exam 30: Nuclear Energy and Elementary Particles

Theoretical physicists have had the least success in combining which force with the electromagnetic force?

Which particle was the last to be discovered?

When comparing product nuclei to reactant nuclei in an exothermal nuclear fusion process,which has the greater binding energy per nucleon?

Baryons are composed of 3 quarks.If all 3-quark compositions of particles could happen,what would be the highest possible charge for such a particle?

The microwave background radiation:

When considering the law of conservation of lepton number for a reaction,how many different lepton numbers must be checked?

What characteristic is preferred in the elements contained in moderator materials when used in a nuclear fission reactor?

If a negative muon decays to form an electron-antineutrino pair and one other particle,the other particle may be a(n):

Which of the following is not a meson?

The spin of all quarks is:

A positron and an electron differ in:

In a fusion reactor,the high temperature of the order of 108 K is required in order that what condition is met?

How much kinetic energy must a deuterium ion (charge =1.6 x 10-19 C) have to approach within 1.6 × 10−14 m of another deuterium ion? ( ke =8.99 x 109 N. m2/ C2) And 1 keV=1.6 x 10-16J)

The law of conservation of strangeness tells us that strangeness is not conserved for which of the following interactions?

If a self-sustained controlled fusion reaction is to operate,a condition which must be met is that the fuel material be subjected to which of the following condition(s)?

The reason that a thermonuclear fusion reaction cannot be maintained in the oceans of the earth is because:

The cosmic background radiation appears compatible with a blackbody source at what temperature?

If a photon produces an electron-positron pair and one other particle,the other particle may be a(n):

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

Filters

In a fusion reactor,the high temperature of the order of 10⁸ K is required in order that what condition is met?

How much kinetic energy must a deuterium ion (charge =1.6 x 10^-19 C) have to approach within 1.6 × 10−¹⁴ m of another deuterium ion? ( k_e =8.99 x 10⁹ N. m²/ C²) And 1 k_eV=1.6 x 10^-16J)