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

Author Question: What is the major observational difference between a Seyfert galaxy and a normal spiral galaxy? ... (Read 78 times)

kwoodring

  • Hero Member
  • *****
  • Posts: 560
on: Jul 27, 2018
What is the major observational difference between a Seyfert galaxy and a normal spiral galaxy?
 
  a. Normal spiral galaxies usually have shorter spiral arms.
  b. Normal spiral galaxies never contain a supermassive black hole at their center.
  c. The central region of a Seyfert galaxy is much brighter.
  d. Seyfert galaxies don't contain any star formation.

Question 2

A type II supernova
 
  a. occurs when a white dwarf's mass exceeds the Chandrasekhar limit.
  b. is the result of helium flash.
  c. is characterized by a spectrum that shows hydrogen lines.
  d. occurs when the iron core of a massive star collapses.
  e. is characterized by a spectrum that shows hydrogen lines and occurs when the iron core of a massive star collapses.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jessofishing

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 27, 2018
Answer to Question 1

c

Answer to Question 2

e


kwoodring

  • Member
  • Posts: 560
Reply 2 on: Jul 27, 2018
Wow, this really help

sultana.d

  • Member
  • Posts: 320
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

The difference between a human and an ape. The difference between a human and an ape.
Major Diagnostic Categories of Mental Disorders Cont Major Diagnostic Categories of Mental Disorders Cont
The diaphragm: The major muscle of breathing. The diaphragm: The major muscle of breathing.
Trump coverage in major news networks Trump coverage in major news networks
A typical open-end wrench. Note the size difference on each end and that the head is angled 15 ... A typical open-end wrench. Note the size difference on each end and that the head is angled 15 ...
Major Vitamins List Major Vitamins List
Video: Interpreting a cladogram Animation

For a complete list of videos, visit our video library