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

Author Question: The fact that the properties of the Universe are close to the dividing line between open and closed ... (Read 24 times)

lracut11

  • Hero Member
  • *****
  • Posts: 536
on: Jul 27, 2018
The fact that the properties of the Universe are close to the dividing line between open and closed Universes refers to the _______________ problem.
 
  Fill in the blank(s) with correct word

Question 2

Why do sunspots occur darker than the rest of the Sun's surface?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Ashley I

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 27, 2018
Answer to Question 1

flatness

Answer to Question 2

Sunspots are cooler than the photosphere with a temperature of about 4200 K. The photosphere has a temperature of about 5800 K. Because the total amount of energy radiated by a surface depends on its temperature raised to the fourth power, sunspots look dark in comparison.


lracut11

  • Member
  • Posts: 536
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

pangili4

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Gram Stain of a person's Gum line Gram Stain of a person's Gum line
Spectral Line Motion in Binary Star Systems Spectral Line Motion in Binary Star Systems
Structure in the Universe Structure in the Universe
In Chuck Close's portrait, the face is quite recognizable when viewed from a distance. Close ... In Chuck Close's portrait, the face is quite recognizable when viewed from a distance. Close ...
Line immunoassay (LIA), also recombinant immunoblot assay (RIBA) and Immuno-stripe, is similar to a ... Line immunoassay (LIA), also recombinant immunoblot assay (RIBA) and Immuno-stripe, is similar to a ...
A close relationship between greenhouse gas emissions and a country’s gross domestic product A close relationship between greenhouse gas emissions and a country’s gross domestic product
Video: Hormonal regulation of blood pressure - RAA system

For a complete list of videos, visit our video library