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Author Question: Compared to the central regions of spiral galaxies, we expect elliptical galaxies to have A) ... (Read 41 times)

Sportsfan2111

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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


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cadimas

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

A


Sportsfan2111

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Reply 2 on: Jul 27, 2018
Excellent

daiying98

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Reply 3 on: Yesterday
:D TYSM

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