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5 Cards in this Set
- Front
- Back
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What type of compact object is the most massive?
A. White Dwarf B. Neutron Star C. Black Hole |
A. White Dwarf
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Which Binary system can have a glowing x-ray accretion disk?
A. Companion star and white dwarf B. Companion star and neutron star C. Companion star and Black hole D. More than one of the above choices |
A. Companion star and white dwarf
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What can be emitted from a binary star system containing a black hole?
A. Gas jets B. X-ray blackbody radiation C. Both of the above choice. D. None of the above choices |
C. Both of the above choice.
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According to the stefan-Boltzmann law, the luminosity of a star will remain approximately the same as it becomes a giant (or supergiant) because its outer layers:
A. Expand and heat up. B. Expand and cool off C. contract and heat up D. Contract and cool off |
A. Expand and Heat up.
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What temperatures for helium fusion (as in yellow giants) much higher than temperatures for hydrogen fusion?
A. Stronger repulsive forces between nuclei B. Stronger attractive forces between nuclei C. Stronger gravitational forces in the core. D. Fusion occurs in a shell, rather than in the core. |
B. Stronger attractive forces between nuclei
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