This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Consider an X-ray binary system in which a compact object, surrounded by an accretion disk, is in a ... (Read 82 times)

chads108

  • Hero Member
  • *****
  • Posts: 507
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.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

juwms

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

D


chads108

  • Hero Member
  • *****
  • Posts: 507
Reply #2 on: Jul 27, 2018
Thank you!


juwms

  • Sr. Member
  • ****
  • Posts: 337
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

General representation of the autonomic nervous system. General representation of the autonomic nervous system.
Female Reproductive System Female Reproductive System
Thyroid System Thyroid System
Procedures and Diagnostic Tests Related to the Integumentary System Procedures and Diagnostic Tests Related to the Integumentary System
A GDI system uses a low-pressure pump in the gas tank similar to other types of fuel-injection ... A GDI system uses a low-pressure pump in the gas tank similar to other types of fuel-injection ...
Overview of lymphatic system structures and the general direction of lymph flow from the extremities ... Overview of lymphatic system structures and the general direction of lymph flow from the extremities ...
Video: Summary of female reproductive cycle days 1-28

For a complete list of videos, visit our video library