Question 1

The radius of a nucleus of ${ } _ { 67 } ^ { 165 } \mathrm { H o}$ (in fm)is

Accepted Answer

A) 15.4 
B) 5.5 
C) 12.8 
D) 6.6 
E) 4.9 
A) 15.4 
B) 5.5 
C) 12.8 
D) 6.6 
E) 4.9

Question 2

How much energy (in MeV)is released when a ${ } _ { 92 } ^ { 235 } \mathrm { U }$ fissions to ${ } _ { 56 } ^ { 141 } \mathrm { Ba }$ and $_{36}^{92} \mathrm{Kr}$ in the reaction $\mathrm { n } + { } _ { 92 } ^ { 235 } \mathrm { U } \rightarrow { } _ { 56 } ^ { 141 } \mathrm { Ba } + { } _ { 36 } ^ { 92 } \mathrm { Kr } + 3 \mathrm { n }$ m(n)= 1.008665 u m(U)= 235.043915 u
M(Ba)= 140.9139 u
M(Kr)= 91.8973 u
U = 1.66 *10 - 27 kg

Accepted Answer

A) 100 
B) 50 
C) 200 
D) 150 
E) 250 
A) 100 
B) 50 
C) 200 
D) 150 
E) 250

Question 3

Naturally radioactive nuclei can decay spontaneously by emitting the following particles:

Accepted Answer

A) helium nuclei,electrons,photons 
B) electrons,neutrons,protons 
C) helium nuclei,electrons,protons 
D) electrons,neutrons,photons 
E) quarks and leptons 
A) helium nuclei,electrons,photons 
B) electrons,neutrons,protons 
C) helium nuclei,electrons,protons 
D) electrons,neutrons,photons 
E) quarks and leptons

Question 4

The radius of an approximately spherical nucleus is given by r =

Accepted Answer

A) r0Z3. 
B) r0Z1/3. 
C) r0A3. 
D) r0A1/3. 
E) r0(A - Z)1/3. 
A) r0Z3. 
B) r0Z1/3. 
C) r0A3. 
D) r0A1/3. 
E) r0(A - Z)1/3.

Question 5

Two nuclei which share the same atomic number Z always are

Accepted Answer

A) stable. 
B) unstable. 
C) isotopes. 
D) isobars. 
E) radioactive. 
A) stable. 
B) unstable. 
C) isotopes. 
D) isobars. 
E) radioactive.

Question 6

What energy is needed (in MeV)so two deuterium atoms moving together will reach the necessary 10 - 14 m for fusion?

Accepted Answer

A) 0.511 
B) 0.14 
C) 2.5 
D) 4.3 
E) 1.0 
A) 0.511 
B) 0.14 
C) 2.5 
D) 4.3 
E) 1.0

Question 7

How fast must two deuterium atoms be moving so they can overcome the Coulomb force of repulsion,and attain the necessary 10 - 14 m for fusion? (m( ${ } _ { 1 } ^ { 2 } \mathrm { H }$ )= 2.014 1 u)

Accepted Answer

A) 3.9 *106 m/s 
B) 1.3 *106 m/s 
C) 2.6 * 106 m/s 
D) 5.2 * 106 m/s 
E) 3.7 *106 m/s 
A) 3.9 *106 m/s 
B) 1.3 *106 m/s 
C) 2.6 * 106 m/s 
D) 5.2 * 106 m/s 
E) 3.7 *106 m/s

Question 8

The radiocarbon content of 14C decreases after the death of a living system with a half-life of 5730 y.If an archaeologist working a dig finds an ancient firepit containing some partially consumed firewood and the wood contains only 12.5 percent of the 14C content of an equal carbon sample from a present-day tree,what is the age of the ancient site?

Accepted Answer

Question 9

The nuclear probability of interacting with neutrons depends most strongly on the neutron's

Accepted Answer

A) mass 
B) area 
C) volume 
D) speed 
E) charge 
A) mass 
B) area 
C) volume 
D) speed 
E) charge

Question 10

How can a nucleus be described by particular values of A,Z and N when the mass of the nucleus is not equal to Zmp + Nmn,where mp and mn are the masses of free protons and neutrons?

Accepted Answer

A) A,Z and N have no intrinsic meaning. 
B) A,Z and N describe the number of particles of given types,but mass has no meaning when part of the mass is elsewhere in the universe. 
C) A,Z and N describe the number of particles an ideal rather than a real nucleus would have. 
D) A,Z and N describe the number of particles of given types in the nucleus,but not their masses in a bound state. 
E) A,Z and N describe the number of particles of given types in the nucleus since the missing mass consists of electrons that are also present in the nucleus. 
A) A,Z and N have no intrinsic meaning. 
B) A,Z and N describe the number of particles of given types,but mass has no meaning when part of the mass is elsewhere in the universe. 
C) A,Z and N describe the number of particles an ideal rather than a real nucleus would have. 
D) A,Z and N describe the number of particles of given types in the nucleus,but not their masses in a bound state. 
E) A,Z and N describe the number of particles of given types in the nucleus since the missing mass consists of electrons that are also present in the nucleus.

Question 11

Linus claims that the added gravitational force of neutrons holds the particles in a nucleus together.Linnea says that they stick together because they lose their electric charge when they form a nucleus.Which one,if either,is correct,and why?

Accepted Answer

A) Linus,because more particles exert gravitational forces on one another than exert electromagnetic forces. 
B) Linus,because the numerical magnitude of G/ke is 7.42 *10 - 21. 
C) Linnea,because the numerical magnitude of G/ke is 7.42 *10 - 21. 
D) Both,because electric charge is lost and then gravity holds the nucleus together. 
E) Neither,because gravity is not lost,and the numerical magnitude of ke/G is 1.35 *1020. 
A) Linus,because more particles exert gravitational forces on one another than exert electromagnetic forces. 
B) Linus,because the numerical magnitude of G/ke is 7.42 *10 - 21. 
C) Linnea,because the numerical magnitude of G/ke is 7.42 *10 - 21. 
D) Both,because electric charge is lost and then gravity holds the nucleus together. 
E) Neither,because gravity is not lost,and the numerical magnitude of ke/G is 1.35 *1020.

Question 12

The reaction energy associated with a nuclear reaction is

Accepted Answer

A) the total change in rest energy as a result of the reaction. 
B) equivalent to the disintegration energy. 
C) the minimum energy necessary for such a reaction to occur. 
D) called the threshold energy. 
E) the binding energy of the nucleons. 
A) the total change in rest energy as a result of the reaction. 
B) equivalent to the disintegration energy. 
C) the minimum energy necessary for such a reaction to occur. 
D) called the threshold energy. 
E) the binding energy of the nucleons.

Question 13

In beta decays

Accepted Answer

A) a proton changes to a neutron. 
B) a neutron changes to a proton. 
C) an electron is present in the nucleus before the decay. 
D) (a),(b)or (c)may occur. 
E) only (a)or (b)may occur. 
A) a proton changes to a neutron. 
B) a neutron changes to a proton. 
C) an electron is present in the nucleus before the decay. 
D) (a),(b)or (c)may occur. 
E) only (a)or (b)may occur.

Question 14

The half-life of 131I is 8.04 days.Three days after it was prepared,its activity was 0.50 $\mu$Ci.How many curies (in $\mu$Ci)were initially prepared?

Accepted Answer

A) .60 
B) .70 
C) .65 
D) .55 
E) .39 
A) .60 
B) .70 
C) .65 
D) .55 
E) .39

Question 15

How many grams of deuterium (atomic mass = 2.014 1 u)must be fused to helium (atomic mass 4.002 6 u)in one second to produce 3 000 MJ of energy? [1 u = 1.66 *10 - 27 kg]

Accepted Answer

The answer of How many grams of deuterium (atomic mass...

Question 16

Two isotopes of uranium have the same

Accepted Answer

A) mass number 
B) neutron number 
C) atomic number 
D) nucleon number 
E) nucleon number and neutron number 
A) mass number 
B) neutron number 
C) atomic number 
D) nucleon number 
E) nucleon number and neutron number

Question 17

A principal mechanism for energy loss during nuclear fusion is bremsstrahlung.This loss is associated with

Accepted Answer

A) x-rays emitted due to electron-ion collisions. 
B) radiation losses due to T4 losses. 
C) conduction losses associated with $\Delta$T. 
D) convection losses associated with$\Delta$T. 
E) neutron collisions with atoms of moderator. 
A) x-rays emitted due to electron-ion collisions. 
B) radiation losses due to T4 losses. 
C) conduction losses associated with $\Delta$T. 
D) convection losses associated with$\Delta$T. 
E) neutron collisions with atoms of moderator.

Question 18

The reaction ${ } _ { 1 } ^ { 0 } \mathrm { n } + { } _ { Z } ^ { A } \mathrm { X } \rightarrow { } _ { Z } ^ { A + 1 } \mathrm { X } ^ { + }$ is known as a ____ reaction.

Accepted Answer

A) beta capture 
B) beta emission 
C) neutron capture 
D) neutron emission 
E) photon emission 
A) beta capture 
B) beta emission 
C) neutron capture 
D) neutron emission 
E) photon emission

Question 19

Find the binding energy per nucleon (in MeV/nucleon)of carbon-12. Assume:
MC = 12.000 000 u
M p = 1.007 825 u
M n = 1.008 665 u
U = 1.66 *10 - 27 kg

Accepted Answer

A) 1.2 
B) 4.2 *10   2 
C) 7.4 
D) 7.7 
E) 5.6 
A) 1.2 
B) 4.2 *10   2 
C) 7.4 
D) 7.7 
E) 5.6

Question 20

Find the unknown atomic number and mass number respectively,for the following reaction $$\mathrm { n } + { } _ { 92 } ^ { 235 } \mathrm { U } \rightarrow { } _ { Z } ^ { A } \mathrm { X } + { } _ { 38 } ^ { 94 } \mathrm { Sr } + 2 \mathrm { n }$$

Accepted Answer

A) 141,53 
B) 140,54 
C) 53,41 
D) 54,140 
E) 54,141 
A) 141,53 
B) 140,54 
C) 53,41 
D) 54,140 
E) 54,141

Exam 30: Nuclear Physics

The radius of a nucleus of 67165Ho{ } _ { 67 } ^ { 165 } \mathrm { H o}67165​Ho (in fm)is

Naturally radioactive nuclei can decay spontaneously by emitting the following particles:

The radius of an approximately spherical nucleus is given by r =

Two nuclei which share the same atomic number Z always are

What energy is needed (in MeV)so two deuterium atoms moving together will reach the necessary 10 - 14 m for fusion?

How fast must two deuterium atoms be moving so they can overcome the Coulomb force of repulsion,and attain the necessary 10 - 14 m for fusion? (m( 12H{ } _ { 1 } ^ { 2 } \mathrm { H }12​H )= 2.014 1 u)

The nuclear probability of interacting with neutrons depends most strongly on the neutron's

How can a nucleus be described by particular values of A,Z and N when the mass of the nucleus is not equal to Zmp + Nmn,where mp and mn are the masses of free protons and neutrons?

Linus claims that the added gravitational force of neutrons holds the particles in a nucleus together.Linnea says that they stick together because they lose their electric charge when they form a nucleus.Which one,if either,is correct,and why?

The reaction energy associated with a nuclear reaction is

In beta decays

The half-life of 131I is 8.04 days.Three days after it was prepared,its activity was 0.50 μ\muμ Ci.How many curies (in μ\muμ Ci)were initially prepared?

How many grams of deuterium (atomic mass = 2.014 1 u)must be fused to helium (atomic mass 4.002 6 u)in one second to produce 3 000 MJ of energy? [1 u = 1.66 *10 - 27 kg]

Two isotopes of uranium have the same

A principal mechanism for energy loss during nuclear fusion is bremsstrahlung.This loss is associated with

The reaction 10n+ZAX→ZA+1X+{ } _ { 1 } ^ { 0 } \mathrm { n } + { } _ { Z } ^ { A } \mathrm { X } \rightarrow { } _ { Z } ^ { A + 1 } \mathrm { X } ^ { + }10​n+ZA​X→ZA+1​X+ is known as a ____ reaction.

Find the binding energy per nucleon (in MeV/nucleon)of carbon-12. Assume: MC = 12.000 000 u M p = 1.007 825 u M n = 1.008 665 u U = 1.66 *10 - 27 kg

Find the unknown atomic number and mass number respectively,for the following reaction n+92235U→ZAX+3894Sr+2n\mathrm { n } + { } _ { 92 } ^ { 235 } \mathrm { U } \rightarrow { } _ { Z } ^ { A } \mathrm { X } + { } _ { 38 } ^ { 94 } \mathrm { Sr } + 2 \mathrm { n }n+92235​U→ZA​X+3894​Sr+2n

Introduction and Vectors

Motion in One Dimension

Motion in Two Dimensions

The Laws of Motion

More Applications of Newtons Laws

Energy of a System

Conservation of Energy

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Relativity

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Oscillatory Motion

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Fluid Mechanics

Temperature and the Kinetic Theory of Gases

Energy in Thermal Processes: the First Law of Thermodynamics

Heat Engines,entropy,and the Second Law of Thermodynamics

Electric Forces and Electric Fields

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Faradays Law and Inductance

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Filters

The radius of a nucleus of ${ } _ { 67 } ^ { 165 } \mathrm { H o}$ (in fm)is

What energy is needed (in MeV)so two deuterium atoms moving together will reach the necessary 10 ^- ¹⁴ m for fusion?

How fast must two deuterium atoms be moving so they can overcome the Coulomb force of repulsion,and attain the necessary 10 ^- ¹⁴ m for fusion? (m( ${ } _ { 1 } ^ { 2 } \mathrm { H }$ )= 2.014 1 u)

How can a nucleus be described by particular values of A,Z and N when the mass of the nucleus is not equal to Zm_p + Nm_n,where m_p and m_n are the masses of free protons and neutrons?

The half-life of ¹³¹I is 8.04 days.Three days after it was prepared,its activity was 0.50 $\mu$ Ci.How many curies (in $\mu$ Ci)were initially prepared?

How many grams of deuterium (atomic mass = 2.014 1 u)must be fused to helium (atomic mass 4.002 6 u)in one second to produce 3 000 MJ of energy? [1 u = 1.66 *10 ^- ²⁷ kg]

The reaction ${ } _ { 1 } ^ { 0 } \mathrm { n } + { } _ { Z } ^ { A } \mathrm { X } \rightarrow { } _ { Z } ^ { A + 1 } \mathrm { X } ^ { + }$ is known as a ____ reaction.

Find the binding energy per nucleon (in MeV/nucleon)of carbon-12. Assume: M_C = 12.000 000 u M_p = 1.007 825 u M_n = 1.008 665 u U = 1.66 *10 ^- ²⁷ kg

Find the unknown atomic number and mass number respectively,for the following reaction $\mathrm { n } + { } _ { 92 } ^ { 235 } \mathrm { U } \rightarrow { } _ { Z } ^ { A } \mathrm { X } + { } _ { 38 } ^ { 94 } \mathrm { Sr } + 2 \mathrm { n }$