What is the color force?
a. The gravitational force mediated by gluons.
b. The force between quarks.
c. The force that ejects quarks from hadrons.
d. The force between electrons from the exchange of quarks.
e. The force that ejects quarks from gluons.
b
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If the Moon rises around 3 A.M., its phase must be
A) full. B) first quarter. C) third quarter. D) waning crescent. E) waxing crescent.
When was the first confirmed exoplanet discovered?
A) Shortly after the invention of the telescope, in the early 1600s B) In prehistoric times C) Around 350 BC, by the Ancient Greeks D) Early in the 21st century E) Near the end of the 20th century
A car is being towed at constant velocity on a horizontal road using a horizontal chain. The tension in the chain must be equal to the weight of the car in order to maintain constant velocity
A) True B) False
Three wires are made of copper having circular cross sections. Wire 1 has a length L and radius r. Wire 2 has a length L and radius 2r. Wire 3 has a length 2L and radius 3r. Which wire has the smallest resistance?
1.wire 1 2.wire 2 3.wire 3 4.All have the same resistance. 5.Not enough information is given to answer the question.