Author Question: The second most abundant element in the solar system is A) silicon. B) helium. C) oxygen. D) ... (Read 74 times)

Themember4

  • Hero Member
  • *****
  • Posts: 538
The second most abundant element in the solar system is
 
  A) silicon. B) helium. C) oxygen. D) hydrogen. E) carbon.

Question 2

How do we know the expansion of the universe is accelerating?
 
  A) We're really not that sure the expansion is accelerating; it's all just a theory.
  B) The rotation curves of galaxies indicate the universe is speeding up.
  C) White dwarf supernova in distant galaxies are fainter than they would be if the expansion were not accelerating.
  D) Redshifts of distant galaxies are increasing with time, so when we repeat the measurements, the redshifts are larger.
  E) We see more of the universe every night, as the observable universe grows in size.



ktidd

  • Sr. Member
  • ****
  • Posts: 319
Answer to Question 1

C

Answer to Question 2

C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

For a complete list of videos, visit our video library