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 22 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
Thanks for the timely response, appreciate it

emsimon14

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

A taxonomic classification of the grey wolf (Canis lupus). A taxonomic classification of the grey wolf (Canis lupus).
Spectral sensitivity of the human cone opsins Spectral sensitivity of the human cone opsins
Spectral Line Motion in Binary Star Systems Spectral Line Motion in Binary Star Systems
CLASSIFICATION OF WAVES CLASSIFICATION OF WAVES
Classification of Antidysrhythmics Classification of Antidysrhythmics
Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ... Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ...
Video: Regulation of GFR: autoregulation via tubuloglomerular feedback, neural & hormonal regulation

For a complete list of videos, visit our video library