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 27 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
Great answer, keep it coming :)

jomama

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

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

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

All objects in the image are distant galaxies – not stars All objects in the image are distant galaxies – not stars
Stars vary widely in size. Stars vary widely in size.
The same star field photographed with (a) a ground-based telescope, which is subject to poor seeing The same star field photographed with (a) a ground-based telescope, which is subject to poor seeing
Classifying the Spectra of Stars Classifying the Spectra of Stars
A very light ideal spring stretches by when it is used to hang a 135-N object. What is the ... A very light ideal spring stretches by when it is used to hang a 135-N object. What is the ...
For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately
Video: Stimulus (introduction)

For a complete list of videos, visit our video library