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

Author Question: How are Cepheids and RR Lyrae stars different? What will be an ideal ... (Read 22 times)

nmorano1

  • Hero Member
  • *****
  • Posts: 598
on: Jul 27, 2018
How are Cepheids and RR Lyrae stars different?
 
  What will be an ideal response?

Question 2

The runoff channels on Mars were most likely formed by:
 
  A) melting underground ice.
  B) catastrophic, but rare flooding.
  C) the annual melting of the polar ice caps.
  D) glaciers.
  E) rain that was part of a water cycle.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jaymee143

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 27, 2018
Answer to Question 1

Cepheids are large mass variable stars with a definite relationship between period and luminosity, which can be as high as thousands of suns. RR Lyrae stars are low mass variable stars with periods under one day, and all have about the same luminosity, about 100 suns.

Answer to Question 2

B


nmorano1

  • Member
  • Posts: 598
Reply 2 on: Jul 27, 2018
Wow, this really help

aruss1303

  • Member
  • Posts: 314
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Astronomers identified 12-billion-year-old white dwarf stars only 100 light years away from Earth Astronomers identified 12-billion-year-old white dwarf stars only 100 light years away from Earth
Much of the dark space between stars, as seen in the sky of the image above, is due to the human eye Much of the dark space between stars, as seen in the sky of the image above, is due to the human eye
The "Emu in the sky," a constellation defined by dark clouds rather than the stars. The "Emu in the sky," a constellation defined by dark clouds rather than the stars.
Hertzsprung-Russell diagram for a set of stars that includes the Sun Hertzsprung-Russell diagram for a set of stars that includes the Sun
Pre–Main-Sequence Stars Pre–Main-Sequence Stars
Evolution of Stars Off the Main Sequence Evolution of Stars Off the Main Sequence
Video: Genetics of Cancer

For a complete list of videos, visit our video library