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

Author Question: What two things are needed to create an emission nebulae? A) interstellar gas and dust B) ... (Read 97 times)

jazziefee

  • Hero Member
  • *****
  • Posts: 505
on: Jul 27, 2018
What two things are needed to create an emission nebulae?
 
  A) interstellar gas and dust
  B) hydrogen fusion and helium ionization
  C) cool stars and much interstellar dust
  D) hot stars and interstellar gas, particularly hydrogen
  E) hydrogen gas and carbon dust

Question 2

At which wavelength range is there no current or planned space observatory?
 
  A) radio
  B) infrared
  C) visible
  D) X-ray
  E) gamma-ray


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

olivia_paige29

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

A


jazziefee

  • Hero Member
  • *****
  • Posts: 505
Reply #2 on: Jul 27, 2018
TY


olivia_paige29

  • Sr. Member
  • ****
  • Posts: 334
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Dreams Disappeared in a Cloud of Dust Dreams Disappeared in a Cloud of Dust
Dust Technology Dust Technology
Taxonomy of all living things Taxonomy of all living things
Pulling a skewer through chocolate and raspberry-sauce dots to create a border of hearts Pulling a skewer through chocolate and raspberry-sauce dots to create a border of hearts
A giant dust cloud about to descend on a farm in Kansas during the 1930s A giant dust cloud about to descend on a farm in Kansas during the 1930s
Living things vs non living things Living things vs non living things
Video: Neural regulation of mechanical digestion- CNS voluntary, ANS & ENS controlled involuntary movements

For a complete list of videos, visit our video library