« previous next »

Author Question: Relate the Galaxy's spiral arms to the spiral-density wave theory. What will be an ideal ... (Read 181 times)

2125004343

  • Hero Member
  • *****
  • Posts: 566
on: Jul 27, 2018
Relate the Galaxy's spiral arms to the spiral-density wave theory.
 
  What will be an ideal response?

Question 2

At what core temperature does hydrogen begin to fuse to helium?
 
  A) 3,000 K
  B) 5,800 K
  C) 1 million K
  D) 10 million K
  E) 100 million K


lindahyatt42

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 27, 2018
Answer to Question 1

Spiral-density waves compress the gas and dust and lead to new star formation, making these regions of higher density bright and blue with new stars. The wave motion is slower than the rotation, and not tied to it, so it can keep going for billions of years.

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

2125004343

  • Hero Member
  • *****
  • Posts: 566
Reply #2 on: Jul 27, 2018
Thank you!


lindahyatt42

  • Sr. Member
  • ****
  • Posts: 322
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

The Spiral The Spiral
Wave Properties Wave Properties
Lie prone with your head turned to one side. Put your arms out to your sides and bend your elbows at ... Lie prone with your head turned to one side. Put your arms out to your sides and bend your elbows at ...
With the rocker arms contacting the base circle of the cam, insert a feeler gauge of the specified ... With the rocker arms contacting the base circle of the cam, insert a feeler gauge of the specified ...
Apply effleurage with wave motion to posterior cervical region. Use fingertips to slide along ... Apply effleurage with wave motion to posterior cervical region. Use fingertips to slide along ...
For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately
Video: Language Areas Animation

For a complete list of videos, visit our video library