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

Author Question: If a sunspot has a temperature of 4,500 K and the surrounding solar surface has a temperature of ... (Read 157 times)

Evvie72

  • Hero Member
  • *****
  • Posts: 519
on: Jul 27, 2018
If a sunspot has a temperature of 4,500 K and the surrounding solar surface has a temperature of 5,800 K, how many times brighter is the surface compared to the sunspot?
 
  a. 0.28
  b. 0.36
  c. 2.8
  d. 3.6
  e. 36

Question 2

Geosynchronous satellites
 
  a. have an orbital period of 24 hours. b. remain above a geographical point on Earth while Earth rotates underneath.
  c. have an orbital period of 24 hours and remain above a geographical point on Earth while Earth rotates underneath. d. None of the other choices are correct.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

sarah_brady415

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 27, 2018
Answer to Question 1

c

Answer to Question 2

c


Evvie72

  • Hero Member
  • *****
  • Posts: 519
Reply #2 on: Jul 27, 2018
TY


sarah_brady415

  • Sr. Member
  • ****
  • Posts: 328
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Sunspots and Solar Flares Sunspots and Solar Flares
Solar particles interact with Earth's magnetosphere. Sizes not to scale. Solar particles interact with Earth's magnetosphere. Sizes not to scale.
Solar Granulation Solar Granulation
Effect of increasing temperature or lowering deltGo+ on the rates of reactions Effect of increasing temperature or lowering deltGo+ on the rates of reactions
Active solar technologies use for heat, cool, and produce electricity Active solar technologies use for heat, cool, and produce electricity
Average Surface Air Pressure – July Average Surface Air Pressure – July
Video: Coronary Heart Disease

For a complete list of videos, visit our video library