Question 1

Which of the following is not massless?

Accepted Answer

A)  neutrino 
B)  muon 
C)  graviton 
D)  photon 
A)  neutrino 
B)  muon 
C)  graviton 
D)  photon

Question 2

A nuclear reaction starts with 1.71 MeV of kinetic energy and a rest energy of 28.2 GeV. If the reaction releases 1.10 MeV, what was the Q of the reaction?

Accepted Answer

A)  1.10 MeV 
B)  6.60 MeV 
C)  0.60 MeV 
D)  28.8 GeV 
E)  11.0 MeV 
A)  1.10 MeV 
B)  6.60 MeV 
C)  0.60 MeV 
D)  28.8 GeV 
E)  11.0 MeV

Question 3

The proton is believed to consist of what quark combination? (up, down, strange, charm, top, bottom)

Accepted Answer

A)  bbt 
B)  ddu 
C)  uds 
D)  ttb 
E)  uud 
A)  bbt 
B)  ddu 
C)  uds 
D)  ttb 
E)  uud

Question 4

The grand unified theory (GUT) would reduce the fundamental forces to

Accepted Answer

A)  1. 
B)  2. 
C)  3. 
D)  4. 
E)  10. 
A)  1. 
B)  2. 
C)  3. 
D)  4. 
E)  10.

Question 5

Which one of the following particles can interact with all 4 of the known forces?

Accepted Answer

A)  electron 
B)  neutrino 
C)  anti-proton 
D)  muon 
E)  graviton 
A)  electron 
B)  neutrino 
C)  anti-proton 
D)  muon 
E)  graviton

Question 6

Controlled fusion has been difficult to achieve primarily due to

Accepted Answer

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

Question 7

Determine the missing reaction product:
 1n + 235U = 141Ba + ________ + 3(1n )

Accepted Answer

Question 8

Find the energy in MeV released in the reaction:
   
Mass of 238U = 238.050786 u
Mass of 234Th = 234.043583 u
Mass of 4He = 4.002603 u

Accepted Answer

The answer of Find the energy in MeV released in...

Question 9

The mass of a proton is 1.6726 × 10-27 kg and the mass of a neutron is 1.6606 × 10-27 kg. A proton captures a neutron forming a deuterium nucleus. One would expect the mass of this nucleus to be

Accepted Answer

A)  less than (1.6726 + 1.6606) × 10-27 kg. 
B)  greater than (1.6726 + 1.6606) × 10-27 kg. 
C)  equal to (1.6726 + 1.6606) × 10-27 kg. 
A)  less than (1.6726 + 1.6606) × 10-27 kg. 
B)  greater than (1.6726 + 1.6606) × 10-27 kg. 
C)  equal to (1.6726 + 1.6606) × 10-27 kg.

Question 10

Name the four known fundamental forces in nature.

Accepted Answer

gravitation, electro

Question 11

The mass of a neutron is ________ the combined mass of a proton and an electron.

Accepted Answer

A)  less than 
B)  more than 
C)  equal to 
A)  less than 
B)  more than 
C)  equal to

Question 12

The Feynman diagram in Figure 30-1 shows two electrons approaching each other, interacting, then leaving each other.
  
 What particle is being exchanged during the interaction?

Accepted Answer

A)  virtual photon 
B)  pion 
C)  W particle 
D)  neutrino 
A)  virtual photon 
B)  pion 
C)  W particle 
D)  neutrino

Question 13

Identify with an H or L to which family, hadron or lepton, each of the following belong
-neutrino

Accepted Answer

A)  hadron 
B)  lepton 
A)  hadron 
B)  lepton

Question 14

The neutrino has

Accepted Answer

A)  negligible rest mass, negative charge, and spin quantum number 1. 
B)  moderate rest mass, positive charge, and no spin. 
C)  negligible rest mass, no charge, and spin quantum number 1/2. 
D)  enormous rest mass, positive charge, and spin quantum number 1/2. 
A)  negligible rest mass, negative charge, and spin quantum number 1. 
B)  moderate rest mass, positive charge, and no spin. 
C)  negligible rest mass, no charge, and spin quantum number 1/2. 
D)  enormous rest mass, positive charge, and spin quantum number 1/2.

Exam 30: Nuclear Reactions and Elementary Particles

Which of the following is not massless?

A nuclear reaction starts with 1.71 MeV of kinetic energy and a rest energy of 28.2 GeV. If the reaction releases 1.10 MeV, what was the Q of the reaction?

The proton is believed to consist of what quark combination? (up, down, strange, charm, top, bottom)

The grand unified theory (GUT) would reduce the fundamental forces to

Which one of the following particles can interact with all 4 of the known forces?

Controlled fusion has been difficult to achieve primarily due to

Determine the missing reaction product: 1n + 235U = 141Ba + ________ + 3(1n )

Find the energy in MeV released in the reaction: Mass of 238U = 238.050786 u Mass of 234Th = 234.043583 u Mass of 4He = 4.002603 u

The mass of a proton is 1.6726 × 10-27 kg and the mass of a neutron is 1.6606 × 10-27 kg. A proton captures a neutron forming a deuterium nucleus. One would expect the mass of this nucleus to be

Name the four known fundamental forces in nature.

The mass of a neutron is ________ the combined mass of a proton and an electron.

The Feynman diagram in Figure 30-1 shows two electrons approaching each other, interacting, then leaving each other. What particle is being exchanged during the interaction?

Identify with an H or L to which family, hadron or lepton, each of the following belong -neutrino

The neutrino has

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Determine the missing reaction product: ¹n + ²³⁵U = ¹⁴¹Ba + ________ + 3(¹n )

Find the energy in MeV released in the reaction: Mass of ²³⁸U = 238.050786 u Mass of ²³⁴Th = 234.043583 u Mass of ⁴He = 4.002603 u

The mass of a proton is 1.6726 × 10^-27 kg and the mass of a neutron is 1.6606 × 10^-27 kg. A proton captures a neutron forming a deuterium nucleus. One would expect the mass of this nucleus to be