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
(a) Mammal species from central Saskatchewan differ greatly in their isotopic signatures. (b) There
Taste regions of the tongue.
Regions of Exceptionally Hot Rock
Cranial nerves and their target regions
Assessment of central venous pressure
World Regions in Global Context: Peoples, Places, and Environments