This topic contains a solution. Click here to go to the answer

Author Question: The density wave theory explains spurs and branches along the spiral arms. a. True b. False ... (Read 92 times)

Diane

  • Hero Member
  • *****
  • Posts: 576
The density wave theory explains spurs and branches along the spiral arms.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

A spectral line produced in the atmosphere of a star may be seen as broad whereas interstellar _______________ lines are very narrow.
 
  a. absorption b. continuous
  c. emission d. All of the other choices are correct.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jordangronback

  • Sr. Member
  • ****
  • Posts: 339
Answer to Question 1

False

Answer to Question 2

a




Diane

  • Member
  • Posts: 576
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it


milbourne11

  • Member
  • Posts: 322
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

Did you know?

The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

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?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

For a complete list of videos, visit our video library