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

Author Question: Compared to the central regions of spiral galaxies, we expect elliptical galaxies to have A) ... (Read 39 times)

Sportsfan2111

  • Hero Member
  • *****
  • Posts: 585
on: Jul 27, 2018
Compared to the central regions of spiral galaxies, we expect elliptical galaxies to have
 
  A) higher mass-to-light ratios because stars in elliptical galaxies are dimmer than those in spirals.
  B) lower mass-to-light ratios because stars in elliptical galaxies are dimmer than those in spirals.
  C) higher mass-to-light ratios because stars in elliptical galaxies do not have high orbital velocities.
  D) lower mass-to-light ratios because elliptical galaxies have less gas and dust than spirals.
  E) the same mass-to-light ratio because they are made of the same material, stars and dark matter.

Question 2

What is a shock front?
 
  A) a wave of pressure that moves faster than the speed of sound
  B) a wave of pressure that moves slightly slower than the speed of sound
  C) a wave of pressure that moves faster than the speed of light
  D) a wave of electromagnetic energy that can create electrical shocks
  E) the wave created when protons slam into electrons


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

cadimas

  • Sr. Member
  • ****
  • Posts: 362
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

A


Sportsfan2111

  • Member
  • Posts: 585
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

dantucker

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Roles of the central and peripheral nervous systems. Roles of the central and peripheral nervous systems.
Central portal of the west facade, Reims Cathedral, France. Central portal of the west facade, Reims Cathedral, France.
The adsorption spectrum of rhodopsin compared with the human scotopic spectral sensitivity curve. The adsorption spectrum of rhodopsin compared with the human scotopic spectral sensitivity curve.
Source Regions: Air Masses Source Regions: Air Masses
The population of algae is compared to the population of corals in a given sampling area The population of algae is compared to the population of corals in a given sampling area
Functional Regions of the Human Brain Functional Regions of the Human Brain
Video: Molecules, Membrane Permeability and Structure

For a complete list of videos, visit our video library