« previous next »

Author Question: Astronomers can measure a star's mass in only certain cases. Which one of the following cases might ... (Read 82 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?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

A white dwarf star in orbit around Sirius (artist's impression) A white dwarf star in orbit around Sirius (artist's impression)
Spectral Line Motion in Binary Star Systems Spectral Line Motion in Binary Star Systems
Polar ice caps lose mass as surface ice melts Polar ice caps lose mass as surface ice melts
Black Hole and Companion Star Black Hole and Companion Star
Find the measure of angle L to the nearest degree Find the measure of angle L to the nearest degree
Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ... Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ...
Video: Cognitive development by Piaget (Preoperational stage or intelligence)

For a complete list of videos, visit our video library