Question 1

In beta minus decay, the number of neutrons in the nucleus is

Accepted Answer

A)  decreased by 1. 
B)  decreased by 2. 
C)  increased by 1. 
D)  increased by 2. 
E)  remains unchanged. 
A)  decreased by 1. 
B)  decreased by 2. 
C)  increased by 1. 
D)  increased by 2. 
E)  remains unchanged. A

Question 2

An electron and a positron annihilate each other, emitting two identical photons in the process. What is the wavelength of these photons? The mass of an electron or positron is 9.11 × 10-31 kg and h = 6.63 × 10-34 Js.

Accepted Answer

A)  1.21 × 10-12 m 
B)  1.73 × 10-12 m 
C)  2.43 × 10-12 m 
D)  3.07 × 10-12 m 
E)  3.46 × 10-12 m 
A)  1.21 × 10-12 m 
B)  1.73 × 10-12 m 
C)  2.43 × 10-12 m 
D)  3.07 × 10-12 m 
E)  3.46 × 10-12 m C

Question 3

A moderator is inserted into a fission reaction to absorb neutrons and prevent additional fissions.

Accepted Answer

A) True 
 B)False  False

Question 4

An old bone sample contains 321. grams of carbon and its activity is 947. decays/min.
(5730. yr half life of Carbon-14)
(a) How many thousand years old is the sample?
(b) What will be the activity of the sample 2000. yrs from now?

Accepted Answer

(a)14.thou

Question 5

The competition between the electrostatic force between the protons in a nucleus and the strong nuclear force determines whether a nucleus is stable.

Accepted Answer

A) True 
 B)False

Question 6

Composite particles that are composed of three quarks are called

Accepted Answer

A)  leptons. 
B)  hadrons. 
C)  mesons. 
D)  bosons. 
E)  baryons. 
A)  leptons. 
B)  hadrons. 
C)  mesons. 
D)  bosons. 
E)  baryons.

Question 7

Fermium-253 has a half-life of 3.00 days. A sample of fermium has 3.88 × 106 nuclei. What is the initial activity of this sample?

Accepted Answer

A)  10.4 Bq 
B)  10.4 Ci 
C)  12.9 Bq 
D)  12.9 Ci 
A)  10.4 Bq 
B)  10.4 Ci 
C)  12.9 Bq 
D)  12.9 Ci

Question 8

Elementary particles that experience the weak nuclear force but not the strong force are called

Accepted Answer

A)  leptons. 
B)  hadrons. 
C)  mesons. 
D)  bosons. 
E)  baryons. 
A)  leptons. 
B)  hadrons. 
C)  mesons. 
D)  bosons. 
E)  baryons.

Question 9

Uranium-238 decays into thorium-234 plus an alpha particle. How much energy is released in this process? 1 u = 931.494 MeV/c2. The relevant mass values are:
  , 4.002603 u;   , 234.043583 u;   , 238.050786 u.

Accepted Answer

A)  4.28 MeV 
B)  3.76 MeV 
C)  3.18 MeV 
D)  2.89 MeV 
E)  5.05 MeV 
A)  4.28 MeV 
B)  3.76 MeV 
C)  3.18 MeV 
D)  2.89 MeV 
E)  5.05 MeV

Question 10

What combination of quarks produces a proton and what are the electric charges on these quarks, expressed in terms of e?

Accepted Answer

uud,with c

Question 11

Composite particles that are composed of two quarks are called

Accepted Answer

A)  leptons. 
B)  hadrons. 
C)  mesons. 
D)  bosons. 
E)  baryons. 
A)  leptons. 
B)  hadrons. 
C)  mesons. 
D)  bosons. 
E)  baryons.

Question 12

When a neutron collides with a uranium-235 nucleus it can induce a variety of fission reactions. One such reaction is   Given the following mass values:   , 139.921620 u;   , 93.915367 u;   , 235.043924 u;   , 1.008665 u, what mass of uranium is needed to produce a 10-kiloton yield?
1 u = 1.660540 × 10-27 kg; 1 kiloton = 5.0 × 1012 J.

Accepted Answer

A)  0.57 kg 
B)  0.66 kg 
C)  6.58 kg 
D)  3.85 kg 
E)  1.10 kg 
A)  0.57 kg 
B)  0.66 kg 
C)  6.58 kg 
D)  3.85 kg 
E)  1.10 kg

Question 13

The decay constant of radon is 0.181 day s-1. A sample of radon contains 6.00 × 108 radon atoms. How many atoms are left after 10.0 days?

Accepted Answer

A)  9.82 × 107 
B)  7.67 × 107 
C)  8.34 × 108 
D)  7.29 × 108 
E)  8.56 × 108 
A)  9.82 × 107 
B)  7.67 × 107 
C)  8.34 × 108 
D)  7.29 × 108 
E)  8.56 × 108

Question 14

What is the nuclear radius of 90Sr?

Accepted Answer

A)  4.0 × 10-15 m 
B)  1.2 × 10-15 m 
C)  1.1 × 10-13 m 
D)  5.4 × 10-15 m 
E)  3.3 × 10-13 m 
A)  4.0 × 10-15 m 
B)  1.2 × 10-15 m 
C)  1.1 × 10-13 m 
D)  5.4 × 10-15 m 
E)  3.3 × 10-13 m

Question 15

Consider a particle composed of quarks.
(a) The negative pion is composed of what combination of up and down quarks?
(b) Is the negative pion a baryon or meson?
(c) Is the negative pion a lepton or a hadron?

Accepted Answer

(a) @#IMG-DLM& d
(b)

Question 16

If a reactor produces an average power of 1000 MW for a year, how much 235U is used up assuming 200 MeV are released per fission?

Accepted Answer

A)  0.35 kg 
B)  1.75 kg 
C)  384 kg 
D)  1.1 × 108 kg 
E)  3.3 × 108 kg 
A)  0.35 kg 
B)  1.75 kg 
C)  384 kg 
D)  1.1 × 108 kg 
E)  3.3 × 108 kg

Question 17

A fission reaction in which more neutrons are given off than are needed to initiate the reaction is called

Accepted Answer

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

Question 18

The symbol for a certain isotope of strontium is   . What is the mass number of this isotope?

Accepted Answer

A)  38 
B)  52 
C)  88 
D)  90 
E)  128 
A)  38 
B)  52 
C)  88 
D)  90 
E)  128

Question 19

The proton is slightly more massive than the neutron.

Accepted Answer

A) True 
 B)False

Question 20

Polonium-216 decays to lead-212 by emitting what kind of nuclear radiation?

Accepted Answer

A)  Alpha 
B)  Beta minus 
C)  Beta plus 
D)  Gamma 
E)  X-rays. 
A)  Alpha 
B)  Beta minus 
C)  Beta plus 
D)  Gamma 
E)  X-rays.

Exam 32: Nuclear Physics and Nuclear Radiation

In beta minus decay, the number of neutrons in the nucleus is

An electron and a positron annihilate each other, emitting two identical photons in the process. What is the wavelength of these photons? The mass of an electron or positron is 9.11 × 10-31 kg and h = 6.63 × 10-34 Js.

A moderator is inserted into a fission reaction to absorb neutrons and prevent additional fissions.

An old bone sample contains 321. grams of carbon and its activity is 947. decays/min. (5730. yr half life of Carbon-14) (a) How many thousand years old is the sample? (b) What will be the activity of the sample 2000. yrs from now?

The competition between the electrostatic force between the protons in a nucleus and the strong nuclear force determines whether a nucleus is stable.

Composite particles that are composed of three quarks are called

Fermium-253 has a half-life of 3.00 days. A sample of fermium has 3.88 × 106 nuclei. What is the initial activity of this sample?

Elementary particles that experience the weak nuclear force but not the strong force are called

Uranium-238 decays into thorium-234 plus an alpha particle. How much energy is released in this process? 1 u = 931.494 MeV/c2. The relevant mass values are: , 4.002603 u; , 234.043583 u; , 238.050786 u.

What combination of quarks produces a proton and what are the electric charges on these quarks, expressed in terms of e?

Composite particles that are composed of two quarks are called

The decay constant of radon is 0.181 day s-1. A sample of radon contains 6.00 × 108 radon atoms. How many atoms are left after 10.0 days?

What is the nuclear radius of 90Sr?

Consider a particle composed of quarks. (a) The negative pion is composed of what combination of up and down quarks? (b) Is the negative pion a baryon or meson? (c) Is the negative pion a lepton or a hadron?

If a reactor produces an average power of 1000 MW for a year, how much 235U is used up assuming 200 MeV are released per fission?

A fission reaction in which more neutrons are given off than are needed to initiate the reaction is called

The symbol for a certain isotope of strontium is . What is the mass number of this isotope?

The proton is slightly more massive than the neutron.

Polonium-216 decays to lead-212 by emitting what kind of nuclear radiation?

Introduction to Physics

One-Dimensional Kinematics

Vectors in Physics

Two-Dimensional Kinematics

Newtons Laws of Motion

Applications of Newtons Laws

Work and Kinetic Energy

Potential Energy and Conservation of Energy

Linear Momentum and Collisions

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Rotational Dynamics and Static Equilibrium

Gravity

Oscillations About Equilibrium

Waves and Sound

Fluids

Temperature and Heat

Phases and Phase Changes

The Laws of Thermodynamics

Electric Charges, Forces, and Fields

Electric Potential and Electric Potential Energy

Electric Current and Direct-Current Circuits

Magnetism

Magnetic Flux and Faradays Law of Induction

Alternating-Current Circuits

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An electron and a positron annihilate each other, emitting two identical photons in the process. What is the wavelength of these photons? The mass of an electron or positron is 9.11 × 10^-31 kg and h = 6.63 × 10^-34 Js.

Fermium-253 has a half-life of 3.00 days. A sample of fermium has 3.88 × 10⁶ nuclei. What is the initial activity of this sample?

Uranium-238 decays into thorium-234 plus an alpha particle. How much energy is released in this process? 1 u = 931.494 MeV/c². The relevant mass values are: , 4.002603 u; , 234.043583 u; , 238.050786 u.

The decay constant of radon is 0.181 day s^-1. A sample of radon contains 6.00 × 10⁸ radon atoms. How many atoms are left after 10.0 days?

What is the nuclear radius of ⁹⁰Sr?

If a reactor produces an average power of 1000 MW for a year, how much ²³⁵U is used up assuming 200 MeV are released per fission?