Question 1

One sometimes hears reference to a "20-kiloton" bomb. What does this mean?

Accepted Answer

A)  It means 20,000 tons of nuclear explosive is used in the bomb. 
B)  It means that the number of "fissile" nuclei is equal to the number of trinitrotoluene molecules in 20,000 tons of TNT explosive. 
C)  It means that the total weight of the bomb (not just the uranium) is 20,000 tons. 
D)  This refers to the maximum pressure generated by the bomb when it explodes. 
E)  It means that the energy released by the bomb is equal to the energy released when 20,000 tons of TNT is exploded. 
A)  It means 20,000 tons of nuclear explosive is used in the bomb. 
B)  It means that the number of "fissile" nuclei is equal to the number of trinitrotoluene molecules in 20,000 tons of TNT explosive. 
C)  It means that the total weight of the bomb (not just the uranium) is 20,000 tons. 
D)  This refers to the maximum pressure generated by the bomb when it explodes. 
E)  It means that the energy released by the bomb is equal to the energy released when 20,000 tons of TNT is exploded.

Question 2

In a nuclear power reactor of the type used to generate electricity, a neutron bombards a uranium nucleus, causing it to split into two large pieces (fission fragments) plus two or three neutrons. Energy is released in this process in the form of electromagnetic radiation and kinetic energy. Which of the following is an accurate statement concerning what happens in such a fission process?

Accepted Answer

A)  The electrical energy generated comes from the kinetic energy of the incident neutrons. 
B)  An intermediate step involves the fusion of protons to form helium nuclei, and energy is released in this process. 
C)  The total mass of the particles after fission is less than the total mass of the particles (uranium nucleus plus one neutron) before fission, and this decrease in mass $\Delta$m is converted into energy E, where E = $\Delta$mc2. 
D)  The electrical energy generated comes from chemical energy stored in the electron bonds of the uranium atom. 
E)  Electrical energy is generated because the fission fragments are electrically charged, whereas the uranium was electrically neutral. 
A)  The electrical energy generated comes from the kinetic energy of the incident neutrons. 
B)  An intermediate step involves the fusion of protons to form helium nuclei, and energy is released in this process. 
C)  The total mass of the particles after fission is less than the total mass of the particles (uranium nucleus plus one neutron) before fission, and this decrease in mass $\Delta$m is converted into energy E, where E = $\Delta$mc2. 
D)  The electrical energy generated comes from chemical energy stored in the electron bonds of the uranium atom. 
E)  Electrical energy is generated because the fission fragments are electrically charged, whereas the uranium was electrically neutral.

Question 3

The exchange particle for quarks is called

Accepted Answer

A)  the gluon. 
B)  the stickon. 
C)  the epoxyon. 
D)  the epsilon. 
A)  the gluon. 
B)  the stickon. 
C)  the epoxyon. 
D)  the epsilon.

Question 4

What kind of reactor produces more fissionable fuel than it consumes?

Accepted Answer

A)  breeder 
B)  moderated 
C)  heavy water 
D)  LOCA 
A)  breeder 
B)  moderated 
C)  heavy water 
D)  LOCA

Question 5

Identify with an H or L to which family, hadron or lepton, each of the following belong
-tauon

Accepted Answer

A)  hadron 
B)  lepton 
A)  hadron 
B)  lepton

Question 6

Mesons consist of

Accepted Answer

A)  triple gluons. 
B)  lepton-quark pairs. 
C)  lepton-antilepton pairs. 
D)  quark-antiquark pairs. 
A)  triple gluons. 
B)  lepton-quark pairs. 
C)  lepton-antilepton pairs. 
D)  quark-antiquark pairs.

Question 7

In the fission reaction 235U + 1n$\rightarrow$141Ba + 92Kr +neutrons, the number of neutrons produced is

Accepted Answer

A)  4. 
B)  2. 
C)  1. 
D)  3. 
E)  0. 
A)  4. 
B)  2. 
C)  1. 
D)  3. 
E)  0.

Question 8

Complete the following nuclear reaction:

Accepted Answer

The answer of Complete the following nuclear reaction:
  ...

Question 9

Starting with AC-227, assume the following sequence of decays occur: (1st) $\alpha$ decay; then (2nd) $\beta$- decay; and finally (3rd) alpha decay. Determine the correct isotopic product after each process has occurred sequentially.

Accepted Answer

(1) Fr-223

Question 10

Which Uranium isotope is the most commonly occurring isotope?

Accepted Answer

A)  u-238 
B)  u-235 
C)  u-237 
D)  u-236 
A)  u-238 
B)  u-235 
C)  u-237 
D)  u-236

Question 11

Starting with 235U, assume the following sequence of decays occur:
(1) (2) (3) Determine the correct isotopic product after each process has occurred sequentially.

Accepted Answer

(1) Thorium ²³¹Th (2) P

Question 12

Name the exchange particles for each of the 4 "fundamental" forces.

Accepted Answer

strong: pion; electr

Question 13

Which of the following is true?

Accepted Answer

A)  All hadrons are mesons or baryons. 
B)  All hadrons are nucleons. 
C)  All hadrons are leptons or mesons. 
D)  All hadrons are baryons or leptons. 
A)  All hadrons are mesons or baryons. 
B)  All hadrons are nucleons. 
C)  All hadrons are leptons or mesons. 
D)  All hadrons are baryons or leptons.

Question 14

Determine the missing product X in the reaction:

Accepted Answer

The answer of Determine the missing product X in the...

Question 15

Consider this reaction:
   
(a) What is the missing daughter nuclei in the reaction? 
(b) How many neutrinos are released by this reaction?

Accepted Answer

The answer of Consider this reaction:
   
(a) What...

Question 16

When a target nucleus is bombarded by an appropriate beam of particles, it is possible to produce

Accepted Answer

A)  a more massive nucleus, but not a less massive one. 
B)  a less massive nucleus, but not a more massive one. 
C)  a nucleus with either greater or smaller atomic number. 
D)  a nucleus with smaller atomic number, but not one with a greater atomic number. 
E)  a nucleus with greater atomic number, but not one with a smaller atomic number. 
A)  a more massive nucleus, but not a less massive one. 
B)  a less massive nucleus, but not a more massive one. 
C)  a nucleus with either greater or smaller atomic number. 
D)  a nucleus with smaller atomic number, but not one with a greater atomic number. 
E)  a nucleus with greater atomic number, but not one with a smaller atomic number.

Question 17

What effect does an increase in the mass of the virtual exchange particle have on the range of the force it mediates?

Accepted Answer

A)  increases it 
B)  has no appreciable effect 
C)  decreases it 
D)  decreases charged particle interactions and increases neutral particle interactions 
A)  increases it 
B)  has no appreciable effect 
C)  decreases it 
D)  decreases charged particle interactions and increases neutral particle interactions

Question 18

Identify with an H or L to which family, hadron or lepton, each of the following belong
-proton

Accepted Answer

A)  hadron 
B)  lepton 
A)  hadron 
B)  lepton

Question 19

Nucleons are

Accepted Answer

A)  hadrons. 
B)  leptons. 
C)  baryons. 
A)  hadrons. 
B)  leptons. 
C)  baryons.

Question 20

A quark is

Accepted Answer

A)  an elementary particle which is a constituent of a hadron & a nucleon. 
B)  a constituent of a nucleon. 
C)  a constituent of a hadron. 
D)  an elementary particle. 
A)  an elementary particle which is a constituent of a hadron & a nucleon. 
B)  a constituent of a nucleon. 
C)  a constituent of a hadron. 
D)  an elementary particle.

Exam 30: Nuclear Reactions and Elementary Particles

One sometimes hears reference to a "20-kiloton" bomb. What does this mean?

The exchange particle for quarks is called

What kind of reactor produces more fissionable fuel than it consumes?

Identify with an H or L to which family, hadron or lepton, each of the following belong -tauon

Mesons consist of

In the fission reaction 235U + 1n →\rightarrow→ 141Ba + 92Kr +neutrons, the number of neutrons produced is

Complete the following nuclear reaction:

Starting with AC-227, assume the following sequence of decays occur: (1st) α\alphaα decay; then (2nd) β\betaβ - decay; and finally (3rd) alpha decay. Determine the correct isotopic product after each process has occurred sequentially.

Which Uranium isotope is the most commonly occurring isotope?

Starting with 235U, assume the following sequence of decays occur: (1) (2) (3) Determine the correct isotopic product after each process has occurred sequentially.

Name the exchange particles for each of the 4 "fundamental" forces.

Which of the following is true?

Determine the missing product X in the reaction:

Consider this reaction: (a) What is the missing daughter nuclei in the reaction? (b) How many neutrinos are released by this reaction?

When a target nucleus is bombarded by an appropriate beam of particles, it is possible to produce

What effect does an increase in the mass of the virtual exchange particle have on the range of the force it mediates?

Identify with an H or L to which family, hadron or lepton, each of the following belong -proton

Nucleons are

A quark is

Measurement and Problem Solving

Kinematics: Description of Motion

Motion in Two Dimensions

Force and Motion

Work and Energy

Linear Momentum and Collisions

Circular Motion and Gravitation

Rotational Motion and Equilibrium

Solids and Fluids

Temperature and Kinetic Theory

Heat

Thermodynamics

Vibrations and Waves

Sound

Electric Charge, Forces, and Fields

Electric Potential, Energy, and Capacitance

Electric Current and Resistance

Basic Electric Circuits

Magnetism

Electromagnetic Induction and Waves

AC Circuits

Reflection and Refraction of Light

Mirrors and Lenses

Physical Optics: The Wave Nature of Light

Vision and Optical Instruments

Relativity

Quantum Physics

Quantum Mechanics and Atomic Physics

The Nucleus

Filters

In the fission reaction 235_U + 1_n $\rightarrow$ 141_Ba + 92_Kr +neutrons, the number of neutrons produced is

Starting with AC-227, assume the following sequence of decays occur: (1st) $\alpha$ decay; then (2nd) $\beta$ - decay; and finally (3rd) alpha decay. Determine the correct isotopic product after each process has occurred sequentially.

Starting with ²³⁵U, assume the following sequence of decays occur: (1) (2) (3) Determine the correct isotopic product after each process has occurred sequentially.