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

Author Question: Compare the speed of spiral density waves with the orbital speeds of stars in the visible part of ... (Read 28 times)

RODY.ELKHALIL

  • Hero Member
  • *****
  • Posts: 591
on: Jul 27, 2018
Compare the speed of spiral density waves with the orbital speeds of stars in the visible part of the Galactic disk.
 
  What will be an ideal response?

Question 2

The two Voyager spacecraft carry a message from Earth, just in case an alien civilization ever runs across them.
 
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bubulittle310@msn.cn

  • Sr. Member
  • ****
  • Posts: 281
Reply #1 on: Jul 27, 2018
Answer to Question 1

Spiral density waves move slower than the orbital speeds at the same distance from the center of a galaxy.

Answer to Question 2

TRUE


RODY.ELKHALIL

  • Member
  • Posts: 591
Reply 2 on: Jul 27, 2018
Wow, this really help

tanna.moeller

  • Member
  • Posts: 328
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

NANDA international two part format NANDA international two part format
Compare the Final Code with the Documentation Compare the Final Code with the Documentation
The fuel pickup tube is part of the fuel sender and pump assembly. The fuel pickup tube is part of the fuel sender and pump assembly.
Recent history of biochemistry shown by the introduction of new techniques. (part 1) Recent history of biochemistry shown by the introduction of new techniques. (part 1)
Gaussian Elimination (Part 2 of 3) Gaussian Elimination (Part 2 of 3)
If the density of an unknown gas is 2.59 g/L at STP, what is its molar mass? If the density of an unknown gas is 2.59 g/L at STP, what is its molar mass?
Video: Uterine (menstrual) cycle - phases

For a complete list of videos, visit our video library