This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: If gravity alone acts to retard the expansion and nothing acts to accelerate it, the Universe is ... (Read 106 times)

KWilfred

  • Hero Member
  • *****
  • Posts: 570
on: Jul 27, 2018
If gravity alone acts to retard the expansion and nothing acts to accelerate it, the Universe is said to be closed if I. gravity is strong enough to stop the expansion in a finite time. II. the density of the Universe is less than the critical density. III. the Universe is finite.
 
  a. I & II
  b. I & III
  c. II & III
  d. I, I, & III
  e. None of the other choices are correct.

Question 2

The spectra of Type II supernova contain no hydrogen lines.
 
  a. True
  b. False
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

paavo

  • Sr. Member
  • ****
  • Posts: 301
Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

False


KWilfred

  • Hero Member
  • *****
  • Posts: 570
Reply #2 on: Jul 27, 2018
Thank you!


paavo

  • Sr. Member
  • ****
  • Posts: 301
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

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.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Thoracic Expansion, Posterior Thoracic Expansion, Posterior
Observable Universe Observable Universe
Common negligent acts Common negligent acts
To keep the foot under the center of gravity, the biped’s femur is angled from hip to knee. The quad To keep the foot under the center of gravity, the biped’s femur is angled from hip to knee. The quad
Camshaft rotation during advance and retard. Camshaft rotation during advance and retard.
The effect of thermal expansion The effect of thermal expansion
Video: Hypoglycemia Animation

For a complete list of videos, visit our video library