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

Author Question: Rotation curves for spiral galaxies show A) they are slowing down. B) most have dark halos. C) ... (Read 98 times)

Diane

  • Hero Member
  • *****
  • Posts: 576
on: Jul 27, 2018
Rotation curves for spiral galaxies show
 
  A) they are slowing down.
  B) most have dark halos.
  C) rotation speed drops off further from the nucleus.
  D) most of the mass lies in the nucleus.
  E) no relation to mass.

Question 2

If the collapsing star is over 25 solar masses, the core may form ________ in a hypernova event.
 
  A) a gamma-ray burster
  B) a millisencond pulsar
  C) an X-rays burster
  D) a pulsar
  E) a black hole


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dlook33

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

E


Diane

  • Member
  • Posts: 576
Reply 2 on: Jul 27, 2018
Gracias!

diana chang

  • Member
  • Posts: 288
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

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.

Rodents Show Empathy-Driven Behavior Rodents Show Empathy-Driven Behavior
Barred Spiral Galaxies Barred Spiral Galaxies
Galaxies Forming by Combining Smaller Units Galaxies Forming by Combining Smaller Units
Robert Smithson, Spiral Jetty. Robert Smithson, Spiral Jetty.
Cumulative change for six personality-trait domains across the life course show distinct patterns. Cumulative change for six personality-trait domains across the life course show distinct patterns.
Halos, Sun Dogs, and Sun Pillars Halos, Sun Dogs, and Sun Pillars
Video: Electromagnetic Spectrum, Chlorophyll and Pigment & Light

For a complete list of videos, visit our video library