Gas falling into a black hole becomes ____.
A) hot, due to an increase in speed and molecular collisions
B) hot, due to radiation from the black hole
C) compacted into solid matter by tidal forces.
D) cool, due tothe loss of gravitational energy.
E) cool, due tothe emission of infrared photons
Correct Answer:
Verified
Q21: Quasars have a(n) _.
A) extremely high blueshift
B)
Q22: Seyfert galaxies_.
A) often have unique shapes spectra
Q23: The energy output of a Seyfert galaxy_.
A)
Q24: Seyfert galaxies are always _ galaxies.
A) dwarf
B)
Q25: The high luminosity of a Seyfert galaxy_.
A)
Q27: When they were first discovered, quasars appeared
Q28: Many galaxies with erupting black holes are
Q29: A supermassive black hole erupts when _.
A)
Q30: The formation process for supermassive black holes
Q31: Matter falling into a black hole arranges
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