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

Author Question: Which element represented most of the atoms in the early Universe? a. helium b. hydrogen c. ... (Read 236 times)

OSWALD

  • Hero Member
  • *****
  • Posts: 580
on: Jul 27, 2018
Which element represented most of the atoms in the early Universe?
 
  a. helium
 b. hydrogen
  c. oxygen
 d. carbon
 e. nitrogen

Question 2

Hydrogen lines are weak in the spectra of hot O-type stars because ____.
 
  a. most of the hydrogen has been converted to helium
 b. a good spectrum of these stars is difficult to obtain
 c. these stars have no atmosphere
 d. gravitational pressure pushes all the hydrogen lines out of the visible spectrum
  e. most of the hydrogen is ionized to high energy levels


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

stanleka1

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

e


OSWALD

  • Hero Member
  • *****
  • Posts: 580
Reply #2 on: Jul 27, 2018
Thank you!


stanleka1

  • Sr. Member
  • ****
  • Posts: 325
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

The life cycle of the early diverging moss genus, Sphagnum, illustrating reproductive adaptations th The life cycle of the early diverging moss genus, Sphagnum, illustrating reproductive adaptations th
Electron Shells Determine the Reactivity of Atoms. Electron Shells Determine the Reactivity of Atoms.
A blood smear. The smear reveals representative cells from each formed element group: red blood cell A blood smear. The smear reveals representative cells from each formed element group: red blood cell
What is the volume of 1.51 x 1024 atoms of an unknown gas at STP? What is the volume of 1.51 x 1024 atoms of an unknown gas at STP?
Skeletal Elements of Early Reptile Skeletal Elements of Early Reptile
Acanthostega, Early Amphibian Acanthostega, Early Amphibian
Video: Helper T cell receptors, activation, proliferation, differentiation & action

For a complete list of videos, visit our video library