Author Question: Based on current estimates of the value of Hubble's constant, how old is the universe? A) between ... (Read 28 times)

cool

  • Hero Member
  • *****
  • Posts: 570
Based on current estimates of the value of Hubble's constant, how old is the universe?
 
  A) between 4 and 6 billion years old
  B) between 8 and 12 billion years old
  C) between 12 and 16 billion years old
  D) between 16 and 20 billion years old
  E) between 20 and 40 billion years old

Question 2

Which of the following is not considered a likely solution to the question of why we are not currently aware of a galactic civilization?
 
  A) There is no galactic civilization because civilizations are not common.
  B) There is no galactic civilization because civilizations do not leave their home worlds.
  C) The galactic civilization is deliberately avoiding contact with us.
  D) The galactic civilization probably is undetectable to us because it makes use of technologies that do not obey the known laws of physics.
  E) There is no galactic civilization because most civilizations destroy themselves before achieving interstellar travel.



jxjsniuniu

  • Sr. Member
  • ****
  • Posts: 343
Answer to Question 1

C

Answer to Question 2

D



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

For a complete list of videos, visit our video library