« previous next »

Author Question: Which characteristic is not generally true of a starburst galaxy? A) The observed features that ... (Read 40 times)

cookcarl

  • Hero Member
  • *****
  • Posts: 539
on: Jul 27, 2018
Which characteristic is not generally true of a starburst galaxy?
 
  A) The observed features that cause us to classify it as a starburst must be only temporary phenomena in the galaxy's history.
  B) The observed features of the starburst are thought to be caused by the presence of a supermassive black hole in the galaxy's center.
  C) Supernovae occur so frequently that their effects combine to drive a galactic wind that blows material into intergalactic space.
  D) Its rate of star formation is many times higher than the rate of star formation in the Milky Way.

Question 2

The apparent magnitude of the Sun is -26, while Sirius has an apparent magnitude of -1. How much brighter does the Sun appear than Sirius?
 
  What will be an ideal response?


nathang24

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

This is a difference of 25 magnitudes. As each 5 magnitudes is a brightness factor of 100 times, then 100 to the fifth power is 10 billion times brighter.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

An adult male killer whale with its characteristic tall dorsal fin swims in the waters near Tysfjord An adult male killer whale with its characteristic tall dorsal fin swims in the waters near Tysfjord
Spitzer Telescope Picture of a galaxy Spitzer Telescope Picture of a galaxy
Cataract. When the pupil is dilated, an abnormal opacity or whiteness of the lens can be observed in Cataract. When the pupil is dilated, an abnormal opacity or whiteness of the lens can be observed in
Assessment of characteristic odors Assessment of characteristic odors
Two areas of reduced cortical volume and one area of increased cortical volume observed in people ... Two areas of reduced cortical volume and one area of increased cortical volume observed in people ...
Major features of human genome Major features of human genome
Video: Integumentary Anatomy

For a complete list of videos, visit our video library