« previous next »

Author Question: What kind of variable stars are pre-Main Sequence stars undergoing gravitational contraction and ... (Read 91 times)

ishan

  • Hero Member
  • *****
  • Posts: 546
on: Jul 27, 2018
What kind of variable stars are pre-Main Sequence stars undergoing gravitational contraction and exhibiting erratic changes in their luminosities?
 
  A) R Coronae Borealis
  B) RR Lyrae
  C) Cepheid
  D) T Tauri
  E) Herbig-Haro

Question 2

What information about an astronomical object can be determined by observing its spectrum?
 
  A) its temperature
  B) its radial motion
  C) its chemical composition
  D) whether it has a strong magnetic field
  E) All of the above


chreslie

  • Sr. Member
  • ****
  • Posts: 307
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

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?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Determination of the complete genome sequence of Haemophilus influenzae by Venter, Smith, and collea Determination of the complete genome sequence of Haemophilus influenzae by Venter, Smith, and collea
Gravitational Forces Gravitational Forces
Variable Gases: Methane Variable Gases: Methane
Main arteries of the leg Main arteries of the leg
The sequence of steps during delivery is shown clearly in these drawings The sequence of steps during delivery is shown clearly in these drawings
Cladogram Based On DNA Sequence Cladogram Based On DNA Sequence
Video: Carpal Tunnel Syndrome

For a complete list of videos, visit our video library