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 245 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?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Evolution of tetrapod visual opsins Evolution of tetrapod visual opsins
Earth Affects People; People Change Earth Earth Affects People; People Change Earth
A heavily corroded radiator from a vehicle that was overheating. A visual inspection discovered that ... A heavily corroded radiator from a vehicle that was overheating. A visual inspection discovered that ...
The rock cycle and the Earth’s physical environment The rock cycle and the Earth’s physical environment
Earth’s Layered Structure Earth’s Layered Structure
Brittle Star Brittle Star
Video: Gas exchange - partial pressure, locations, external and internal respiration

For a complete list of videos, visit our video library