The exchange particle for quarks is called
A) the stickon.
B) the gluon.
C) the epsilon.
D) the epoxyon.
B
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Spicules
a. are found in the photosphere. b. are magnetic disturbances that push large loops of material off the solar surface. c. are responsible for twisting the solar magnetic field and causing the sunspot cycle. d. appear in the corona near the north and south poles of the sun during a total solar eclipse. e. are visible in filtergrams of the solar chromosphere.
Given that a force vector extends from the origin to (120 N, -60.0 N), find the magnitude of the vector.
A. 140 N B. 134 N C. 180 N D. 60.0 N
A solar mass star will evolve off the main sequence when
A) it completely runs out of hydrogen. B) it expels a planetary nebula to cool off and release radiation. C) it explodes as a violent nova. D) it builds up a core of inert helium. E) it loses all its neutrinos, so fusion must cease.
As the solar nebula contracts due to gravitation, the cloud:
A) spins faster. B) expands. C) becomes more spherical in shape. D) changes direction of motion. E) begins to cool.