This topic contains a solution. Click here to go to the answer

Author Question: The energy source at the center of our galaxy a. is not visible at optical wavelengths. b. ... (Read 78 times)

newbem

  • Hero Member
  • *****
  • Posts: 579
The energy source at the center of our galaxy
 
  a. is not visible at optical wavelengths.
  b. produces X-rays.
  c. must be less than 10 AU in diameter.
  d. is not visible at optical wavelengths, produces X-rays, and must be less than 10 AU in diameter.
  e. None of the other choices are correct.

Question 2

Describe two methods that could be used to determine the temperature of a star.
 
  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

coreycathey

  • Sr. Member
  • ****
  • Posts: 333
Answer to Question 1

d

Answer to Question 2

The Balmer thermometer is a method of determining the temperature of a star. It works because the strength of the Balmer lines depends on the temperature of the star's surface layers. Theoretical calculations can predict how strong the Balmer lines should be for stars of various temperatures. Temperature has a similar effect on the spectral lines of other elements, but the temperature at which the lines reach their maximum strength is different for each element. Another way is to use the temperature-luminosity relationship.




newbem

  • Member
  • Posts: 579
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it


Sarahjh

  • Member
  • Posts: 370
Reply 3 on: Yesterday
Gracias!

 

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

For a complete list of videos, visit our video library