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 19 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
Excellent

xiazhe

  • Member
  • Posts: 331
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

Did you know?

Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

The two bright stars are (left) Alpha Centauri and (right) Beta Centauri. The two bright stars are (left) Alpha Centauri and (right) Beta Centauri.
People have seen patterns in the stars since ancient times.[5] This 1690 depiction of the constellat People have seen patterns in the stars since ancient times.[5] This 1690 depiction of the constellat
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Motion of Stars at the Poles Motion of Stars at the Poles
Stars and the Interstellar Medium Stars and the Interstellar Medium
Plotting the Ages of Stars Plotting the Ages of Stars
Video: Neuron Structure Animation

For a complete list of videos, visit our video library