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

Author Question: Which element represented most of the atoms in the early Universe? a. helium b. hydrogen c. ... (Read 210 times)

OSWALD

  • Hero Member
  • *****
  • Posts: 580
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
Answer to Question 1

b

Answer to Question 2

e




stanleka1

  • Sr. Member
  • ****
  • Posts: 325

 

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

For a complete list of videos, visit our video library