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Author Question: Consider an X-ray binary system in which a compact object, surrounded by an accretion disk, is in a ... (Read 89 times)

chads108

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on: Jul 27, 2018
Consider an X-ray binary system in which a compact object, surrounded by an accretion disk, is in a binary orbit with another star. All of the following statements about such accretion disks are true except:
 
  A) The radiation from an accretion disk may vary rapidly in time.
  B) The compact object may be either a neutron star or a black hole.
  C) X-rays are emitted by the hot gas in the accretion disk.
  D) Several examples of flattened accretion disks being fed by a large companion star can be seen clearly in photos from the Hubble Space Telescope.
  E) The accretion disk consists of material that spills off the companion star.

Question 2

The nucleus of a comet is typically
 
  A) a few hundred kilometers across, and bright, shiny white from its ices.
  B) a few meters in diameter.
  C) located between the orbits of Mars and Jupiter.
  D) a few kilometers in size, and very low in density.
  E) very durable, made of iron.


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juwms

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

D


chads108

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Reply #2 on: Jul 27, 2018
Thank you!


juwms

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Reply #3 on: Jul 27, 2018
Always glad to help...


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