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 9 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
:D TYSM

marict

  • Member
  • Posts: 304
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

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.

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.

Hydronephrosis. Normal kidney (left) and kidney with hydronephrosis (right) are compared. Note the d Hydronephrosis. Normal kidney (left) and kidney with hydronephrosis (right) are compared. Note the d
The central and peripheral nervous system The central and peripheral nervous system
Compared to a chimpanzee, the human newborn has relatively little room to spare as it passes through Compared to a chimpanzee, the human newborn has relatively little room to spare as it passes through
Agricultural Regions Agricultural Regions
The Central and Peripheral Nervous System The Central and Peripheral Nervous System
Please explain the different Rf values for xanthophyll’s in paper chromatography compared to ... Please explain the different Rf values for xanthophyll’s in paper chromatography compared to ...
Video: Complement Proteins Animation

For a complete list of videos, visit our video library