What Do We Mean When We Say That the Rotation

question 36

Multiple Choice

What do we mean when we say that the rotation curve for a spiral galaxy is "flat"?

• A)The disk of a spiral galaxy is quite flat rather than spherical like the halo.
• B)The amount of light emitted by stars at different distances is about the same throughout the galaxy.
• C)Gas clouds orbiting far from the galactic center have approximately the same orbital speed as gas clouds located further inward.
• D)All the galaxy's mass is concentrated in its flat, gaseous disk.

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Definitions:

Confederates

Participants in a study who have been briefed by the researcher to behave in a particular way.

Deceiving

The act of misleading or giving a false impression.

Plagiarism

The practice of taking someone else's work or ideas and passing them off as one's own without proper acknowledgment.

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