Question 1

In a nuclear reaction, what value is conserved in addition to electric charge, energy, and momentum?

Accepted Answer

A) atomic number 
B) neutron number 
C) nucleon number 
D) all of the given answers 
E) none of the given answers 
A) atomic number 
B) neutron number 
C) nucleon number 
D) all of the given answers 
E) none of the given answers C

Question 2

What is the source of the energy the Sun radiates to us?

Accepted Answer

A) chemical reactions 
B) nuclear fission reactions 
C) nuclear fusion reactions 
D) magnetic explosions 
E) cosmic rays 
A) chemical reactions 
B) nuclear fission reactions 
C) nuclear fusion reactions 
D) magnetic explosions 
E) cosmic rays C

Question 3

Discuss the problems involved in achieving controlled fusion as a source of energy.

Accepted Answer

The fusion of light elements requires a temperature of millions of degrees to overcome the Coulomb repulsion. Magnetic and inertial confinement are being developed to achieve the densities necessary for net energy release.

Question 4

If the internal temperature of the sun is 15 x 106 K, what is the average kinetic energy of protons in this environment?

Accepted Answer

A) 0.040 eV 
B) 1.3 keV 
C) 1.9 keV 
D) 1.3 MeV 
E) 1.9 MeV 
A) 0.040 eV 
B) 1.3 keV 
C) 1.9 keV 
D) 1.3 MeV 
E) 1.9 MeV

Question 5

When a neutron collides with a uranium-235 nucleus it can induce a variety of fission reactions. One such reaction is   +   $\rightarrow$  +   + 2   . Given the following mass values:   , 139.921620 u;   , 93.915367 u;   , 235.043924 u;   , 1.008665 u, how much energy is released in this reaction? 1 u = 931.494 MeV/c2.

Accepted Answer

A) 185 MeV 
B) 202 MeV 
C) 32.6 MeV 
D) 65.7 MeV 
E) 98.6 MeV 
A) 185 MeV 
B) 202 MeV 
C) 32.6 MeV 
D) 65.7 MeV 
E) 98.6 MeV

Question 6

A proton strikes an Oxygen-18 nucleus producing Fluorine-18 and another particle. What other particle is produced by this nuclear reaction?

Accepted Answer

A) a neutron 
B) an alpha particle 
C) a gamma particle 
D) a β- particle 
E) a β+ particle 
A) a neutron 
B) an alpha particle 
C) a gamma particle 
D) a β- particle 
E) a β+ particle

Question 7

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

Accepted Answer

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

Question 8

The Sun is powered by the proton-proton cycle.

Accepted Answer

A) True 
 B)False

Question 9

A series of fission reactions in which subsequent reactions are initiated by the neutrons produced in the previous reactions is called a

Accepted Answer

A) critical reaction. 
B) chain reaction. 
C) usion reaction. 
D) neutron catastrophe. 
E) chemical reaction. 
A) critical reaction. 
B) chain reaction. 
C) usion reaction. 
D) neutron catastrophe. 
E) chemical reaction.

Question 10

A fusion reaction works because the binding energy of the resulting nucleus

Accepted Answer

A) is greater than the binding energy of the original nuclei. 
B) is equal to the binding energy of the original nuclei. 
C) is less than the binding energy of the original nuclei. 
D) is released in the process. 
E) is absorbed in the process. 
A) is greater than the binding energy of the original nuclei. 
B) is equal to the binding energy of the original nuclei. 
C) is less than the binding energy of the original nuclei. 
D) is released in the process. 
E) is absorbed in the process.

Question 11

When uranium fissions, the fission fragments are

Accepted Answer

A) each about half the mass of the uranium nucleus. 
B) about 2/5 and 3/5 the mass of the uranium nucleus. 
C) about 1/3 and 2/3 the mass of the uranium nucleus. 
D) about 1/4 and 3/4 the mass of the uranium nucleus. 
E) about 1/5 and 4/5 the mass of the uranium nucleus. 
A) each about half the mass of the uranium nucleus. 
B) about 2/5 and 3/5 the mass of the uranium nucleus. 
C) about 1/3 and 2/3 the mass of the uranium nucleus. 
D) about 1/4 and 3/4 the mass of the uranium nucleus. 
E) about 1/5 and 4/5 the mass of the uranium nucleus.

Question 12

The energy radiated by a star, such as the Sun, results from

Accepted Answer

A) beta decay. 
B) alpha decay. 
C) fission reactions. 
D) fusion reactions. 
E) gravitational collapse. 
A) beta decay. 
B) alpha decay. 
C) fission reactions. 
D) fusion reactions. 
E) gravitational collapse.

Question 13

What is the Q value for the following reaction?  7Li + 1p = 4He + 4He
(7.016005) (1.007825) (4.002603) (4.002603)

Accepted Answer

A) 13.35 MeV 
B) 13.57 MeV 
C) 15.37 MeV 
D) 17.35 MeV 
E) 17.53 MeV 
A) 13.35 MeV 
B) 13.57 MeV 
C) 15.37 MeV 
D) 17.35 MeV 
E) 17.53 MeV

Question 14

Controlled fusion has been difficult to achieve primarily due to

Accepted Answer

A) the high temperatures required to overcome Coulomb repulsion. 
B) negligible proton cross section. 
C) the difficulty of slowing the fusion neutrons. 
D) the weak interaction. 
A) the high temperatures required to overcome Coulomb repulsion. 
B) negligible proton cross section. 
C) the difficulty of slowing the fusion neutrons. 
D) the weak interaction.

Question 15

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) The electrical energy generated comes from chemical energy stored in the electron bonds of the uranium atom. 
C) Electrical energy is generated because the fission fragments are electrically charged, whereas the uranium was electrically neutral. 
D) An intermediate step involves the fusion of protons to form helium nuclei, and energy is released in this process. 
E) 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 Δm is converted into energy E, where E = Δmc2. 
A) The electrical energy generated comes from the kinetic energy of the incident neutrons. 
B) The electrical energy generated comes from chemical energy stored in the electron bonds of the uranium atom. 
C) Electrical energy is generated because the fission fragments are electrically charged, whereas the uranium was electrically neutral. 
D) An intermediate step involves the fusion of protons to form helium nuclei, and energy is released in this process. 
E) 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 Δm is converted into energy E, where E = Δmc2.

Question 16

The fuel for nuclear fission is

Accepted Answer

A) H. 
B) He. 
C) Li. 
D) U. 
E) any radioactive material. 
A) H. 
B) He. 
C) Li. 
D) U. 
E) any radioactive material.

Question 17

The fuel for nuclear fusion in the center of the Sun is

Accepted Answer

A) H. 
B) He. 
C) O. 
D) U. 
E) any radioactive material. 
A) H. 
B) He. 
C) O. 
D) U. 
E) any radioactive material.

Question 18

Which Uranium isotope is the most commonly occurring isotope?

Accepted Answer

A) U-235 
B) U-236 
C) U-237 
D) U-238 
E) U-239 
A) U-235 
B) U-236 
C) U-237 
D) U-238 
E) U-239

Question 19

Thermal neutrons are

Accepted Answer

A) neutrons that are hot. 
B) neutrons that are cold. 
C) neutrons with a kinetic energy of about 1/40 eV 
D) neutrons that are used for heating. 
E) neutrons that are used for cooling. 
A) neutrons that are hot. 
B) neutrons that are cold. 
C) neutrons with a kinetic energy of about 1/40 eV 
D) neutrons that are used for heating. 
E) neutrons that are used for cooling.

Question 20

In references to nuclear chain reactions, what is meant by the term CRITICAL MASS?

Accepted Answer

Critical mass is the

Exam 42: Nuclear Energy: Efects and Uses of Radiation

In a nuclear reaction, what value is conserved in addition to electric charge, energy, and momentum?

What is the source of the energy the Sun radiates to us?

Discuss the problems involved in achieving controlled fusion as a source of energy.

If the internal temperature of the sun is 15 x 106 K, what is the average kinetic energy of protons in this environment?

A proton strikes an Oxygen-18 nucleus producing Fluorine-18 and another particle. What other particle is produced by this nuclear reaction?

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

The Sun is powered by the proton-proton cycle.

A series of fission reactions in which subsequent reactions are initiated by the neutrons produced in the previous reactions is called a

A fusion reaction works because the binding energy of the resulting nucleus

When uranium fissions, the fission fragments are

The energy radiated by a star, such as the Sun, results from

What is the Q value for the following reaction? 7Li + 1p = 4He + 4He (7.016005) (1.007825) (4.002603) (4.002603)

Controlled fusion has been difficult to achieve primarily due to

The fuel for nuclear fission is

The fuel for nuclear fusion in the center of the Sun is

Which Uranium isotope is the most commonly occurring isotope?

Thermal neutrons are

In references to nuclear chain reactions, what is meant by the term CRITICAL MASS?

Introduction, Measurement, Estimating

Describing Motion: Kinematics in One Dimension

Kinematics in Two or Three Dimensions; Vectors

Dynamics: Newtons Laws of Motion

Using Newtons Laws: Friction, Circular Motion, Drag Forces

Gravitation and Newtons6 Synthesis

Work and Energy

Conservation of Energy

Linear Momentum

Rotational Motion

Angular Momentum; General Rotation

Static Equilibrium; Elasticity and Fracture

Fluids

Oscillations

Wave Motion

Sound

Temperature, Thermal Expansion, and the Ideal Gas Law

Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

Second Law of Thermodynamics

Electric Charge and Electric Field

Gausss Law

Electric Potential

Capacitance, Dielectrics, Electric Energy Storage

Electric Currents and Resistance

Dc Circuits

Magnetism

Sources of Magnetic Field

Electromagnetic Induction and Faradays Law

Inductance, Electromagnetic Oscillations, and Ac Circuits

Maxwells Equations and Electromagnetic Waves

Light: Reflection and Refraction

Lenses and Optical Instruments

The Wave Nature of Light; Interference

Diffraction and Polarization

Special Theory of Relativity

Early Quantum Theory and Models of the Atom

Quantum Mechanics

Quantum Mechanics of Atoms

Molecules and Solids

Nuclear Physics and Radioactivity

Elementary Particle

Astrophysics and Cosmology

Filters

If the internal temperature of the sun is 15 x 10⁶ K, what is the average kinetic energy of protons in this environment?

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

What is the Q value for the following reaction? ⁷Li +¹p = ⁴He + ⁴He (7.016005) (1.007825) (4.002603) (4.002603)