The grand unified theory (GUT) is a sought-after model that would unify three of the four forces of ...

The grand unified theory (GUT) is a sought-after model that would unify three of the four forces of nature. Which force is the one it would not include?
 
  A) gravitational
  B) strong
  C) weak
  D) electromagnetic

Question 2

The grand unified theory (GUT) would reduce the fundamental forces to
 
  A) 1.
  B) 2.
  C) 3.
  D) 4.
  E) 10.

Question 3

Donald Glazer
 
  A) invented the particle detector tube.
  B) invented the bubble chamber.
  C) discovered radium and polonium.
  D) discovered radioactivity.
  E) observed back-scattering from nuclei.

Question 4

Mesons consist of
 
  A) quark-antiquark pairs.
  B) triple gluons.
  C) lepton-antilepton pairs.
  D) lepton-quark pairs.

Question 5

Which of the following have the least RBE (relative biological effectiveness)?
 
  A) slow neutrons
  B) beta particles
  C) alpha particles
  D) fast protons
  E) gamma rays

Question 6

When a quark emits or absorbs a gluon, the quark changes
 
  A) its mass.
  B) its charge.
  C) its color.
  D) into an antiquark.
  E) into a fermion.