Question 1

What are the approximate binding energies per nucleon (in MeV) around A = 60 and A = 240, respectively?

Accepted Answer

A)  9.4, 7.0 
B)  7.6, 8.7 
C)  7.0, 9.4 
D)  7.0, 8.0 
E)  8.7, 7.6 
A)  9.4, 7.0 
B)  7.6, 8.7 
C)  7.0, 9.4 
D)  7.0, 8.0 
E)  8.7, 7.6

Question 2

The neutrino was proposed by Wolfgang Pauli to overcome the apparent violation of which of the following conservation laws in beta decay?

Accepted Answer

A)  energy 
B)  momentum 
C)  energy and momentum 
D)  charge 
E)  energy, momentum, and charge 
A)  energy 
B)  momentum 
C)  energy and momentum 
D)  charge 
E)  energy, momentum, and charge

Question 3

One mole of   has a mass of approximately

Accepted Answer

A)  13 g 
B)  27 g 
C)  14 g 
D)  20 g 
E)  40 g 
A)  13 g 
B)  27 g 
C)  14 g 
D)  20 g 
E)  40 g

Question 4

A nuclear reactor periodically emits radioactive isotopes that travel outward at a speed of 1.0 km/s. If these isotopes have a half-life of 12 ms, what is the average distance they travel before decaying?

Accepted Answer

A)  12 μm 
B)  12 m 
C)  17 m 
D)  1.0 km 
E)  83 km 
A)  12 μm 
B)  12 m 
C)  17 m 
D)  1.0 km 
E)  83 km

Question 5

In the fission reaction n +   →   + ? + 4n, what are the Z and A for the unknown fission product?

Accepted Answer

A)  37, 90 
B)  35, 94 
C)  36, 90 
D)  37, 91 
E)  36, 91 
A)  37, 90 
B)  35, 94 
C)  36, 90 
D)  37, 91 
E)  36, 91

Question 6

The half-life of 30P is 2.50 minutes. If a sample of 30P has 1.60 × 1010 nuclei present, what is its activity?

Accepted Answer

A)  4.6 × 107 Bq 
B)  7.4 × 107 Bq 
C)  6.4 × 109 Bq 
D)  1.6 × 1010 Bq 
E)  1.6 × 109 Bq 
A)  4.6 × 107 Bq 
B)  7.4 × 107 Bq 
C)  6.4 × 109 Bq 
D)  1.6 × 1010 Bq 
E)  1.6 × 109 Bq

Question 7

If a 70 kg person received a dose of 3.2 mGy of gamma rays of RBE = 0.80, what is the biologically equivalent dose in rem?

Accepted Answer

A)  0.012 
B)  0.18 
C)  0.0026 
D)  0.26 
E)  18 
A)  0.012 
B)  0.18 
C)  0.0026 
D)  0.26 
E)  18

Question 8

The burning of one gallon of gasoline releases about 2 × 108 J. If each nuclear fission reaction in a nuclear power plant releases 173 MeV, what quantity of uranium-235 would produce the same energy as burning a gallon of gasoline?

Accepted Answer

A)  28 g 
B)  0.28 g 
C)  2.8 g 
D)  0.0028 g 
A)  28 g 
B)  0.28 g 
C)  2.8 g 
D)  0.0028 g

Question 9

What is the element X for the nuclide   ?

Accepted Answer

A)  Zn 
B)  Se 
C)  Gd 
D)  Ge 
A)  Zn 
B)  Se 
C)  Gd 
D)  Ge

Question 10

In the nucleus, what are the maximum number of neutrons in a neutron energy level, and the maximum number of protons in a proton energy level, respectively?

Accepted Answer

A)  1, 1 
B)  1, 2 
C)  2, 1 
D)  2, 2 
E)  2, 8 
A)  1, 1 
B)  1, 2 
C)  2, 1 
D)  2, 2 
E)  2, 8

Question 11

Fusion normally involves relatively light nuclei because

Accepted Answer

A)  fusion produces heavier nuclei, and the binding energy per nucleon decreases with atomic number for low atomic numbers. 
B)  they are the most plentiful. 
C)  they are easier to ionize and thus to cause their nuclei to coalesce. 
D)  fusion produces heavier nuclei, and the binding energy per nucleon increases with atomic number for low atomic numbers. 
A)  fusion produces heavier nuclei, and the binding energy per nucleon decreases with atomic number for low atomic numbers. 
B)  they are the most plentiful. 
C)  they are easier to ionize and thus to cause their nuclei to coalesce. 
D)  fusion produces heavier nuclei, and the binding energy per nucleon increases with atomic number for low atomic numbers.

Question 12

Nuclear fuel enrichment is the process by which the concentration of what component of nuclear fuel is increased artificially?

Accepted Answer

A)  Plutonium-239 
B)  Uranium-235 
C)  Deuterium 
D)  Uranium-238 
A)  Plutonium-239 
B)  Uranium-235 
C)  Deuterium 
D)  Uranium-238

Question 13

In the reaction n + 12C → α + ?, what is the unknown product nucleus?

Accepted Answer

A)  (13
C)  
B)  (9
C)  
C)  (10
B)  
D)  (9
B)  
E)  (9Be) 
A)  (13
C)  
B)  (9
C)  
C)  (10
B)  
D)  (9
B)  
E)  (9Be)

Question 14

Radium-226   decays by alpha decay. What are A and Z for the daughter nuclide?

Accepted Answer

A)  226, 92 
B)  222, 92 
C)  226, 88 
D)  222, 88 
E)  222, 86 
A)  226, 92 
B)  222, 92 
C)  226, 88 
D)  222, 88 
E)  222, 86

Question 15

What is the symbol for the nuclide with 38 protons and 50 neutrons?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 16

For a selected atom in a sample of a radioactively decaying isotope, the probability that it will decay during a time interval of a specified length is

Accepted Answer

A)  dependent on how long it has been since t = 0. 
B)  independent of when the time interval starts relative to the current time. 
C)  dependent upon how old the atom is. 
D)  fundamentally unpredictable. 
A)  dependent on how long it has been since t = 0. 
B)  independent of when the time interval starts relative to the current time. 
C)  dependent upon how old the atom is. 
D)  fundamentally unpredictable.

Question 17

The fusion reaction 2H + 3H → 4He + n releases 17.6 MeV of energy. The mass of 2H is 2.01410 u, the mass of 4He is 4.00260 u, and the mass of the neutron is 1.00866 u. What is the mass of 3H?

Accepted Answer

A)  2.9972 u 
B)  3.0161 u 
C)  3.0349 u 
D)  3.0422 u 
E)  2.9998 u 
A)  2.9972 u 
B)  3.0161 u 
C)  3.0349 u 
D)  3.0422 u 
E)  2.9998 u

Exam 29: Nuclear Physics

What are the approximate binding energies per nucleon (in MeV) around A = 60 and A = 240, respectively?

The neutrino was proposed by Wolfgang Pauli to overcome the apparent violation of which of the following conservation laws in beta decay?

One mole of has a mass of approximately

A nuclear reactor periodically emits radioactive isotopes that travel outward at a speed of 1.0 km/s. If these isotopes have a half-life of 12 ms, what is the average distance they travel before decaying?

In the fission reaction n + → + ? + 4n, what are the Z and A for the unknown fission product?

The half-life of 30P is 2.50 minutes. If a sample of 30P has 1.60 × 1010 nuclei present, what is its activity?

If a 70 kg person received a dose of 3.2 mGy of gamma rays of RBE = 0.80, what is the biologically equivalent dose in rem?

The burning of one gallon of gasoline releases about 2 × 108 J. If each nuclear fission reaction in a nuclear power plant releases 173 MeV, what quantity of uranium-235 would produce the same energy as burning a gallon of gasoline?

What is the element X for the nuclide ?

In the nucleus, what are the maximum number of neutrons in a neutron energy level, and the maximum number of protons in a proton energy level, respectively?

Fusion normally involves relatively light nuclei because

Nuclear fuel enrichment is the process by which the concentration of what component of nuclear fuel is increased artificially?

In the reaction n + 12C → α + ?, what is the unknown product nucleus?

Radium-226 decays by alpha decay. What are A and Z for the daughter nuclide?

What is the symbol for the nuclide with 38 protons and 50 neutrons?

For a selected atom in a sample of a radioactively decaying isotope, the probability that it will decay during a time interval of a specified length is

The fusion reaction 2H + 3H → 4He + n releases 17.6 MeV of energy. The mass of 2H is 2.01410 u, the mass of 4He is 4.00260 u, and the mass of the neutron is 1.00866 u. What is the mass of 3H?

Introduction

Motion Along a Line

Motion in a Plane

Force and Newtons Laws of Motion

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Temperature and the Ideal Gas

Heat

Thermodynamics

Electric Forces and Fields

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Reflection and Refraction of Light

Optical Instruments

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Quantum Physics

Particle Physics

Filters

The half-life of ³⁰P is 2.50 minutes. If a sample of ³⁰P has 1.60 × 10¹⁰ nuclei present, what is its activity?

The burning of one gallon of gasoline releases about 2 × 10⁸ J. If each nuclear fission reaction in a nuclear power plant releases 173 MeV, what quantity of uranium-235 would produce the same energy as burning a gallon of gasoline?

In the reaction n + ¹²C → α + ?, what is the unknown product nucleus?

The fusion reaction ²H + ³H → ⁴He + n releases 17.6 MeV of energy. The mass of ²H is 2.01410 u, the mass of ⁴He is 4.00260 u, and the mass of the neutron is 1.00866 u. What is the mass of ³H?