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

Author Question: Cepheid variable stars stop pulsating when: A) they evolve out of the instability strip of the ... (Read 30 times)

NguyenJ

  • Hero Member
  • *****
  • Posts: 516
on: Jul 27, 2018
Cepheid variable stars stop pulsating when:
 
  A) they evolve out of the instability strip of the H-R diagram.
  B) they enter the zero-age main sequence.
  C) they begin their stable lives fusing hydrogen.
  D) they reach the lower edge of the main sequence of the H-R diagram.

Question 2

__________are objects used to map spiral arms.
 
  A) Spiral locators
  B) Spiral tracers
  C) Arm finders
  D) Spiral waves


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Toya9913

  • Sr. Member
  • ****
  • Posts: 341
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
Thanks for the timely response, appreciate it

jordangronback

  • Member
  • Posts: 339
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

The asymmetrical appearance of Mira, an oscillating variable star. The asymmetrical appearance of Mira, an oscillating variable star.
Summation of Heart Sounds, Variable S1 Summation of Heart Sounds, Variable S1
stop sign stop sign
The Pleiades, an open cluster of stars in the constellation of Taurus. These stars share a common mo The Pleiades, an open cluster of stars in the constellation of Taurus. These stars share a common mo
Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
Conditional Instability Conditional Instability
Video: Acid-base imbalances - respiratory acidosis and alkalosis

For a complete list of videos, visit our video library