Question 1

Which of the following forces is the weakest?

Accepted Answer

A) strong nuclear 
B) weak nuclear 
C) electromagnetic 
D) gravitational 
A) strong nuclear 
B) weak nuclear 
C) electromagnetic 
D) gravitational

Question 2

In the proton-proton cycle,the eventual product is

Accepted Answer

A) heavy hydrogen. 
B) tritium. 
C) helium-3. 
D) helium-4. 
A) heavy hydrogen. 
B) tritium. 
C) helium-3. 
D) helium-4.

Question 3

Which of the following particles is (are)considered to be elementary?

Accepted Answer

A) the neutron 
B) the meson 
C) the electron 
D) All of the above. 
A) the neutron 
B) the meson 
C) the electron 
D) All of the above.

Question 4

What following quantity is conserved in the following reaction:  
?

Accepted Answer

A) charge 
B) lepton number 
C) baryon number 
D) All of the above. 
A) charge 
B) lepton number 
C) baryon number 
D) All of the above.

Question 5

The pion (mπ = 140 MeV/c2)is thought to be the particle exchanged in the nuclear force.What is the maximum range of this particle if its "time of existence" is as long as can be allowed by the uncertainty principle ΔE⋅Δt = h/2π? (h/2π = 1.05 × 10−34 J⋅s,c = 3.00 × 108 m/s,and 1 eV = 1.6 × 10−19 J)

Accepted Answer

A) 1.2 × 10−15 m 
B) 1.4 × 10−15 m 
C) 2.0 × 10−15 m 
D) 7.5 × 10−15 m 
A) 1.2 × 10−15 m 
B) 1.4 × 10−15 m 
C) 2.0 × 10−15 m 
D) 7.5 × 10−15 m

Question 6

One in 4 600 water molecules contains a deuterium atom.If all the deuterium could be extracted from 1 m3 of water and then reacted,how much energy could be obtained? (Each D-D fusion liberates 3.65 MeV of energy,1 MeV = 1.6 × 10-13 J,ρwater = 103 kg/m3,one mole of water has a mass of 18 g,and ​NA ​= 6.02 × 1023)

Accepted Answer

A) 4.2E+12 J 
B) 1.3E+25 J 
C) 3.5E+11 J 
D) 2.1E+12 J 
E) ​6.9E+14 J 
A) 4.2E+12 J 
B) 1.3E+25 J 
C) 3.5E+11 J 
D) 2.1E+12 J 
E) ​6.9E+14 J

Question 7

The spin of all quarks is

Accepted Answer

A) 0. 
B) 1/2. 
C) 1. 
D) 1/3 or 2/3. 
A) 0. 
B) 1/2. 
C) 1. 
D) 1/3 or 2/3.

Question 8

If the lifetime of a particle is roughly inversely proportional to the relative strength of the force involved,then for the strong,electromagnetic,and weak forces,arrange the forces according to their resulting lifetimes ranging from shortest to longest lifetimes.

Accepted Answer

A) strong,electromagnetic,weak 
B) weak,electromagnetic,strong 
C) weak,strong,electromagnetic 
D) strong,weak,electromagnetic 
A) strong,electromagnetic,weak 
B) weak,electromagnetic,strong 
C) weak,strong,electromagnetic 
D) strong,weak,electromagnetic

Question 9

Theoretical physicists have had the greatest success in combining which force with the electromagnetic force?

Accepted Answer

A) strong nuclear force 
B) weak nuclear force 
C) gravitational force 
D) the force caused by the exchange of gluons 
A) strong nuclear force 
B) weak nuclear force 
C) gravitational force 
D) the force caused by the exchange of gluons

Question 10

What is the particle referred to as a WIMP?

Accepted Answer

A) the result of a neutrino oscillation 
B) a hypothetical particle left over from the Big Bang 
C) a hypothetical particle in the MOND theory 
D) none of the above 
A) the result of a neutrino oscillation 
B) a hypothetical particle left over from the Big Bang 
C) a hypothetical particle in the MOND theory 
D) none of the above

Question 11

The exchange of mediating photons can produce

Accepted Answer

A) neither a repulsive nor an attractive force. 
B) either a repulsive or an attractive force. 
C) a repulsive force. 
D) an attractive force. 
A) neither a repulsive nor an attractive force. 
B) either a repulsive or an attractive force. 
C) a repulsive force. 
D) an attractive force.

Question 12

Baryons are composed of 3 quarks.If all 3-quark compositions of particles could happen,what would be the highest possible charge for such a particle?

Accepted Answer

A) 1 e 
B) 2 e 
C) 3 e 
D) There is no upper limit,though the charge is usually less than 3e. 
A) 1 e 
B) 2 e 
C) 3 e 
D) There is no upper limit,though the charge is usually less than 3e.

Question 13

Consider the following reaction.
N → p + e-
This reaction is impossible because it violates which conservation law?​

Accepted Answer

A) ​baryon number 
B) ​lepton number 
C) ​strangeness 
D) ​charge 
A) ​baryon number 
B) ​lepton number 
C) ​strangeness 
D) ​charge

Question 14

The particle thought responsible for particle masses is

Accepted Answer

A) the graviton. 
B) the gluon. 
C) the Ω- particle. 
D) the Higgs boson. 
A) the graviton. 
B) the gluon. 
C) the Ω- particle. 
D) the Higgs boson.

Question 15

The weak force that acts between an electron and a quark is caused by the exchange of

Accepted Answer

A) photons. 
B) gluons. 
C) gravitons. 
D) W+,W-,or Z0 bosons. 
A) photons. 
B) gluons. 
C) gravitons. 
D) W+,W-,or Z0 bosons.

Question 16

Mesons are composed of ________ quarks,and baryons are composed of ________ quarks.

Accepted Answer

A) two,two 
B) two,three 
C) three,two 
D) three,three 
A) two,two 
B) two,three 
C) three,two 
D) three,three

Question 17

If a photon produces an electron-positron pair and one other particle,the other particle may be a(n)

Accepted Answer

A) muon. 
B) antineutrino. 
C) neutrino. 
D) photon. 
A) muon. 
B) antineutrino. 
C) neutrino. 
D) photon.

Question 18

The strong force is mediated by

Accepted Answer

A) the gluon. 
B) the W- boson. 
C) the W+ boson. 
D) All of these choices. 
A) the gluon. 
B) the W- boson. 
C) the W+ boson. 
D) All of these choices.

Question 19

​Consider the following reaction.
Π+ + n → π- + p
This reaction is impossible because it violates which conservation law?

Accepted Answer

A) ​baryon number 
B) ​lepton number 
C) ​strangeness 
D) ​charge 
E) ​two of the above 
A) ​baryon number 
B) ​lepton number 
C) ​strangeness 
D) ​charge 
E) ​two of the above

Question 20

Which of the following is not a meson?

Accepted Answer

A) the muon 
B) the pion 
C) the kaon 
D) All of the above are mesons. 
A) the muon 
B) the pion 
C) the kaon 
D) All of the above are mesons.

Exam 30: Nuclear Energy and Elementary Particles

Which of the following forces is the weakest?

In the proton-proton cycle,the eventual product is

Which of the following particles is (are)considered to be elementary?

What following quantity is conserved in the following reaction: ?

The spin of all quarks is

If the lifetime of a particle is roughly inversely proportional to the relative strength of the force involved,then for the strong,electromagnetic,and weak forces,arrange the forces according to their resulting lifetimes ranging from shortest to longest lifetimes.

Theoretical physicists have had the greatest success in combining which force with the electromagnetic force?

What is the particle referred to as a WIMP?

The exchange of mediating photons can produce

Baryons are composed of 3 quarks.If all 3-quark compositions of particles could happen,what would be the highest possible charge for such a particle?

Consider the following reaction. N → p + e- This reaction is impossible because it violates which conservation law?​

The particle thought responsible for particle masses is

The weak force that acts between an electron and a quark is caused by the exchange of

Mesons are composed of ________ quarks,and baryons are composed of ________ quarks.

If a photon produces an electron-positron pair and one other particle,the other particle may be a(n)

The strong force is mediated by

​Consider the following reaction. Π+ + n → π- + p This reaction is impossible because it violates which conservation law?

Which of the following is not a meson?

Units, Trigonometry, and Vectors

Motion in One Dimension

Motion in Two Dimensions

Newtons Laws of Motion

Energy

Momentum, Impulse, and Collisions

Rotational Motion and Gravitation

Rotational Equilibrium and Dynamics

Fluids and Solids

Thermal Physics

Energy in Thermal Processes

The Laws of Thermodynamics

Vibrations and Waves

Sound

Electric Forces and Fields

Electrical Energy and Capacitance

Current and Resistance

Direct-Current Circuits

Magnetism

Induced Voltages and Inductance

Alternating-Current Circuits and Electromagnetic Waves

Reflection and Refraction of Light

Mirrors and Lenses

Wave Optics

Optical Instruments

Relativity

Quantum Physics

Atomic Physics

Nuclear Physics

Filters

Consider the following reaction. N → p + e^- This reaction is impossible because it violates which conservation law?

Mesons are composed of quarks,and baryons are composed of quarks.

Consider the following reaction. Π⁺ + n → π^- + p This reaction is impossible because it violates which conservation law?