« previous next »

Author Question: Simple observations of the darkness of the night sky and the redshifts of the galaxies tell you ... (Read 54 times)

jho37

  • Hero Member
  • *****
  • Posts: 531
on: Jul 27, 2018
Simple observations of the darkness of the night sky and the redshifts of the galaxies tell you that:
 
  A) the Universe is contracting.
  B) the Universe must have an edge.
  C) the Universe is perfect and unchanging.
  D) the Universe must have had a beginning.

Question 2

The _____ is the average density of the Universe needed to make its curvature flat.
 
  A) relative density
  B) arithmetic density
  C) nuclear density
  D) critical density


shewald78

  • Sr. Member
  • ****
  • Posts: 340
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

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

Spiral Galaxies (Nearly Face-on Views) Spiral Galaxies (Nearly Face-on Views)
Spiral Galaxies Seen Nearly Edge On from the Milky Way Spiral Galaxies Seen Nearly Edge On from the Milky Way
Distant Galaxies Distant Galaxies
Wild chimpanzees make and use simple tools to obtain food, learning tool making from one another. Wild chimpanzees make and use simple tools to obtain food, learning tool making from one another.
A Typical Pattern of Sleep Stages During a Single Night A Typical Pattern of Sleep Stages During a Single Night
Sleepless Night Sleepless Night
Video: Febrile Seizure

For a complete list of videos, visit our video library