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

Author Question: Absolute visual magnitude is the: A) apparent magnitude of a star observed from Earth. B) ... (Read 180 times)

washai

  • Hero Member
  • *****
  • Posts: 523
on: Jul 27, 2018
Absolute visual magnitude is the:
 
  A) apparent magnitude of a star observed from Earth.
  B) luminosity of a star observed from a distance of 1000 pc.
  C) apparent magnitude of a star observed from a distance of 10 pc.
  D) luminosity of a star observed from Earth.

Question 2

Which of the following statements is true of the main sequence region of a Hertzsprung-Russell (H-R) diagram?
 
  A) It runs from the right edge of the diagram to the left edge.
  B) It includes only 10 percent of all normal stars.
  C) The hot main-sequence stars are more luminous than the cool main-sequence stars.
  D) The stars that are not on the main sequence have the same nuclear reactions as the main-sequence stars.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

nathang24

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

C


washai

  • Hero Member
  • *****
  • Posts: 523
Reply #2 on: Jul 27, 2018
Thank you!


nathang24

  • Sr. Member
  • ****
  • Posts: 314
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Solar particles interact with Earth's magnetosphere. Sizes not to scale. Solar particles interact with Earth's magnetosphere. Sizes not to scale.
Moon and Earth Moon and Earth
Jane Goodall first observed Gombe chimpanzees chewing leaves, then dipping the chewed-up “wadge” int Jane Goodall first observed Gombe chimpanzees chewing leaves, then dipping the chewed-up “wadge” int
The visual areas of the human cerebral cortex. The visual areas of the human cerebral cortex.
Distribution of Earth's Water Distribution of Earth's Water
Black Hole and Companion Star Black Hole and Companion Star
Video: Adolescent Diabetes

For a complete list of videos, visit our video library