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 105 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
Excellent

triiciiaa

  • Member
  • Posts: 349
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
Supernova Light Curves Supernova Light Curves
Galaxies Forming by Combining Smaller Units Galaxies Forming by Combining Smaller Units
Dose-Response Curves for Morphine Dose-Response Curves for Morphine
The upper panel shows that scores of four diverse samples of boys on a moral reasoning test show a ... The upper panel shows that scores of four diverse samples of boys on a moral reasoning test show a ...
Find the factor demand for labour and the amount of output it will produce. Show all ... Find the factor demand for labour and the amount of output it will produce. Show all ...
Video: Pasteur's Experiment

For a complete list of videos, visit our video library