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

Author Question: A star's luminosity is the A) total amount of energy that the star radiates each second. B) ... (Read 91 times)

NguyenJ

  • Hero Member
  • *****
  • Posts: 516
on: Jul 27, 2018
A star's luminosity is the
 
  A) total amount of energy that the star radiates each second.
  B) total amount of energy that the star will radiate over its entire lifetime.
  C) surface temperature of the star.
  D) lifetime of the star.
  E) apparent brightness of the star in our sky.

Question 2

The stars in our sky twinkle in brightness and color because of ________.
 
  A) rapid changes in the brightnesses and colors of stars caused by changes in their spectra
  B) turbulence in the Earth's atmosphere
  C) the bubbling and boiling of gases on the surfaces of stars
  D) light pollution


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

GCabra

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

B


NguyenJ

  • Member
  • Posts: 516
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

sultana.d

  • Member
  • Posts: 320
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Betelgeuse is a semiregular variable star Betelgeuse is a semiregular variable star
Evolution of the Sun's luminosity, radius and effective temperature compared to the present Sun Evolution of the Sun's luminosity, radius and effective temperature compared to the present Sun
Some energy interconversions in living organisms Some energy interconversions in living organisms
Telomere length is related to the amount of time adults spend in leisure time activity. Source: Ada Telomere length is related to the amount of time adults spend in leisure time activity. Source: Ada
A turbocharger uses some of the heat energy that would normally be wasted. A turbocharger uses some of the heat energy that would normally be wasted.
Effect of a catalyst on activation energy Effect of a catalyst on activation energy
Video: Dendrite Animation

For a complete list of videos, visit our video library