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.
C
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A negative muon decays to form an electron and a mu neutrino and one additional particle. The other particle must be a(n)
a. positron. b. antineutrino. c. neutrino. d. photon.
A child throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground. What is the magnitude of the ball's velocity just before it hits the ground?
A) 1.22 m/s B) 6.79 m/s C) 7.45 m/s D) 9.14 m/s E) 4.58 m/s
Suppose scientists discover (somehow) that if ?T, the average global temperature increase since 1900, were to exceed 1.0°C, Greenland’s ice sheet would irreversibly start to collapse within 20 years, raising ocean levels significantly. ?T is currently 0.8°C. What might we do to prevent this from happening?
A. Cut CO2 emissions in half. B. Completely stop emitting CO2 now. C. Actively start removing CO2 from the atmosphere. D. We probably can’t prevent this from happening, no matter what we do.
All the planets in the solar system rotate in the same direction as they orbit the Sun
Indicate whether the statement is true or false