The Figure Below Shows the Rotation Curve of a Galaxy

question 37

Multiple Choice

The figure below shows the rotation curve of a galaxy.How does the mass enclosed within a given distance from the galaxy's center vary?

• A) The mass is concentrated near the center.
• B) The enclosed mass increases linearly with distance.
• C) The enclosed mass increases with the square of distance.
• D) The enclosed mass increases like the square root of distance.

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