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

Author Question: What role does helium play in spectral classification? What will be an ideal ... (Read 14 times)

student77

  • Hero Member
  • *****
  • Posts: 567
on: Jul 27, 2018
What role does helium play in spectral classification?
 
  What will be an ideal response?

Question 2

A quasar's spectrum is hugely redshifted. What does this large redshift tells us about the quasar?
 
  A) the composition of the quasar
  B) the size of the quasar's central, supermassive black hole
  C) the distance to the quasar
  D) the type of host galaxy in which the quasar resides


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

JaynaD87

  • Sr. Member
  • ****
  • Posts: 368
Reply #1 on: Jul 27, 2018
Answer to Question 1

It is ionized in the hottest O class stars, and prominent but neutral in B class stars; in cooler stars, it is not noted.

Answer to Question 2

C


student77

  • Member
  • Posts: 567
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

laurnthompson

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Nursing intervention classification Nursing intervention classification
In pretend play, toy figures and animals “come to life” and interact with each other. In pretend play, toy figures and animals “come to life” and interact with each other.
Basic classification of streptococci-based on hemolysis. Basic classification of streptococci-based on hemolysis.
Classification of Antihypertensive Agents Classification of Antihypertensive Agents
Vitamin K plays a major role in blood coagulation, or clotting Vitamin K plays a major role in blood coagulation, or clotting
Therapeutic Classification Therapeutic Classification
Video: Chronology of leptin research (A history of leptin research)

For a complete list of videos, visit our video library