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A. hydrogen and helium
C. hydrogen, helium and carbon
D. hydrogen, helium, carbon, and neon
E. hydrogen, helium, carbon, neon, and oxygen
C. distance from the main sequence
A. it has high orbital velocities.
B. it has high densities.
C. it has high temperatures.
D. it conserved angular momentum when it collapsed.
E. the energy from the supernova explosion that formed them made them spin faster.
A. They have very strong magnetic fields.
B. They rotate very rapidly.
C. They are neutron stars.
D. They have a density approximately equal to the density of an atomic nucleus.
E. All of the above are true.
A. neutron drip.
B. neutrino pressure.
C. electron degeneracy pressure.
D. neutron degeneracy pressure.
E. a central black hole.
A. the star may shine as brightly as billions of stars.
B. elements heavier than iron are formed.
C. material that later formed the Earth and us humans was distributed between the stars
D. matter is ejected at tens of thousands of kilometers per second.
E. All of the above.
A. a supergiant star
B. a white dwarf
C. a main sequence star
D. a giant star
E. the sun
B. parallactic distance.
C. surface temperature.
D. chemical composition.
A. particles of matter.
B. particles of antimatter.
C. visible light.
E. None of the above.