Modern Physics PHY 36001

Question 1.

The "nuclear strong force" is stronger than the "nuclear weak force."

       True
       False

Question 2.

The nuclear strong force has a longer range than the nuclear weak force.

       True
       False

Question 3.

Bosons always have one-half-integer spins.

       True
       False

Question 4.

The particles that belong to the "lepton family" are always fermions.

       True
       False

Question 5.

A piece of matter and anti-matter collided and were annihilated. Therefore, we know that if the piece of matter had mass m, then the piece of anti-matter had mass -m.

       True
       False

Question 1.

In order from strongest to weakest, please list the four fundamental forces:

      a. strong nuclear, weak nuclear, electromagnetic, gravity.
      b. strong nuclear, gravity, weak nuclear, electromagnetic.
      c. strong nuclear, electromagnetc, weak nuclear, gravity.
      d. strong nuclear, electromagnetic, gravity, weak nuclear.

Question 2.

Which two of the four fundamental forces are infinite ranged?

      a. Strong nuclear, weak nuclear.
      b. Weak nuclear and electromagnetic.
      c. Gravity and electromagnetic.
      d. Gravity and weak nuclear.

Question 3.

A charged particle of spin s and mass m, and its anti-particle will have

      a. the same mass, charge and spin.
      b. the same mass and spin, but opposite charges.
      c. the same mass but opposite spins and charges.
      d. the same spin, but opposite masses and charges.

Question 4.

From the building blocks of quark and antiquarks one can construct

      a. baryons and mesons.
      b. baryons but not mesons.
      c. leptons and glueballs.
      d. leptons and baryons.