« previous next »

Author Question: Simple observations of the darkness of the night sky and the redshifts of the galaxies tell you ... (Read 48 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?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

The nurse can make observations about the patient's general appearance while talking with the p The nurse can make observations about the patient's general appearance while talking with the p
Giant Elliptical Galaxies Giant Elliptical Galaxies
Galaxies with Rings Galaxies with Rings
Five Galaxies and Their Spectra Five Galaxies and Their Spectra
A Simple Neural Model of Classical Conditioning A Simple Neural Model of Classical Conditioning
Video: Types of antimicrobial substances (interferons & complement protein)

For a complete list of videos, visit our video library