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

Author Question: Spectra of stars often show narrow absorption lines from interstellar matter. What type of ... (Read 60 times)

formula1

  • Hero Member
  • *****
  • Posts: 666
Spectra of stars often show narrow absorption lines from interstellar matter. What type of interstellar matter produces these?
 
  A) dust
  B) neutral gas
  C) ionized gas
  D) molecules
  E) All of the above.

Question 2

Einstein's ________ is a candidate for the dark energy that would be a repulsive force that may exist throughout space, and accelerate the expansion of the universe.
 
  Fill in the blank(s) with correct word



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bdobbins

  • Sr. Member
  • ****
  • Posts: 326
Answer to Question 1

B

Answer to Question 2

cosmological constant




formula1

  • Member
  • Posts: 666
Reply 2 on: Jul 27, 2018
Wow, this really help


nothere

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Excellent

 

Did you know?

The human body produces and destroys 15 million blood cells every second.

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?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

For a complete list of videos, visit our video library