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

Author Question: The presence of elements heavier than helium in stars is very important because A) they provide ... (Read 108 times)

iveyjurea

  • Hero Member
  • *****
  • Posts: 555
The presence of elements heavier than helium in stars is very important because
 
  A) they provide the raw materials for the formation of planets and life
  B) without them they could not form
  C) they help stabilize their interiors
  D) they are responsible for the fusion reactions at their centers

Question 2

Which of the following is not consistent with recent observations of the cosmic microwave background by Planckt?
 
  A) The universe is geometrically flat (in the four dimensions of spacetime).
  B) The matter density (both luminous and dark matter combined) in the universe is only about one-fourth of the critical density.
  C) Dark energy, whatever it is, represents the majority of the energy content of the universe.
  D) The universe is at least 20 billion years old.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

GCabra

  • Sr. Member
  • ****
  • Posts: 331
Answer to Question 1

A

Answer to Question 2

D




iveyjurea

  • Member
  • Posts: 555
Reply 2 on: Jul 27, 2018
:D TYSM


duy1981999

  • Member
  • Posts: 341
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

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

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

For a complete list of videos, visit our video library