Although we know less about dark matter in elliptical galaxies than in spiral galaxies, what does current evidence suggest?

A) Unlike the broad distribution of dark matter in spiral galaxies, elliptical galaxies probably contain dark matter only near their centers.
B) Elliptical galaxies probably contain far more dark matter than spiral galaxies.
C) Elliptical galaxies probably contain about the same proportion of their mass in the form of dark matter as do spiral galaxies.
D) Elliptical galaxies probably contain far less dark matter than spiral galaxies.


C

Physics & Space Science

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At a distance of 15.0 m from a sound source, the intensity level is 60.0 dB. What is the intensity level (in decibels) at a point 2.00 m from the source if the source radiates equally in all directions?

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Physics & Space Science

For visible light, which property of visible electromagnetic waves changes with color?

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