__________ is the prediction of special relativity that moving clocks run slow.
Fill in the blank(s) with correct word
[Ques. 2] Particles possessing half-integral spins are called _________ and particles with integral spins are called ________.
a. quarks b. fermions
c. bosons d. antiquarks
[Ques. 3] t and b quarks are named
a. truth and beauty.
b. up and down.
c. top and bottom.
d. Itchy and Scratchy.
e. none of the above.
[Ques. 4] Quarks have electric charges of magnitude
a. e.
b. 1/3 e.
c. 2/3 e.
d. 0.
e. none of the above
[Ques. 5] The electron
a. is an absolutely stable particle. b. decays via the weak interaction.
c. has zero mass. d. is a lepton.
[Ques. 6] In interactions taking place by the weak force, which of the following quantities are conserved?
a. electric charge
b. baryon number
c. mass-energy
d. strangeness
e. linear momentum
f. angular momentum (spin)
[Ques. 7] In interactions taking place by the strong force, which of the following quantities are conserved?
a. electric charge
b. baryon number
c. mass-energy
d. strangeness
e. linear momentum
f. angular momentum (spin)
[Ques. 8] A particle that interacts via the strong force is a(n)
a. lepton.
b. baryon.
c. meson.
d. intermediate (or gauge) boson.
e. hadron.
[Ques. 9] Quarks come in what flavors?
a. up, down and strange b. charm, top and bottom
c. red, green and blue d. all of the above
[Ques. 10] The positron
a. is an antielectron.
b. was the first antimatter particle discovered.
c. is the same as a proton.
d. all of the above
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