« previous next »

Author Question: Astronomers can measure a star's mass in only certain cases. Which one of the following cases might ... (Read 91 times)

gonzo233

  • Hero Member
  • *****
  • Posts: 557
on: Jul 27, 2018
Astronomers can measure a star's mass in only certain cases. Which one of the following cases might allow astronomers to measure a star's mass?
 
  A) We know the star's luminosity and distance. B) The star is of spectral type G.
  C) The star is a member of a binary star system. D) The star is of spectral type A.

Question 2

Increasing the temperature of a blackbody by a factor of 3 will increase its energy by a factor of
 
  A) 3. B) 6. C) 9. D) 12. E) 81.


jlaineee

  • Sr. Member
  • ****
  • Posts: 380
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

gonzo233

  • Hero Member
  • *****
  • Posts: 557
Reply #2 on: Jul 27, 2018
TY


jlaineee

  • Sr. Member
  • ****
  • Posts: 380
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Brain mass as a function of body mass in mammals. Brain mass as a function of body mass in mammals.
Proper Motion of Barnard’s Star Proper Motion of Barnard’s Star
A Binary Star System A Binary Star System
Body mass index table. Body mass index table.
The DNA from one chromosome has a mass of ~20 billion Daltons The DNA from one chromosome has a mass of ~20 billion Daltons
Gravitational Force Due to a Distribution of Mass Problem 1 Gravitational Force Due to a Distribution of Mass Problem 1
Video: What is Reverse Osmosis?

For a complete list of videos, visit our video library