If a Galaxy Had No Dark Matter,how Would the Velocity

question 28

Multiple Choice

If a galaxy had no dark matter,how would the velocity (v) of a star that orbited far outside the visible extent of the galaxy depend on its distance (r) from the center of the galaxy?

• A)ν ∝ r⁻²
• B)ν ∝ r⁻¹
• C)ν ∝
• D)ν ∝ r
• E)ν ∝ r²

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