The Mass Enclosed in Any Orbit Can Be Estimated from the Equation

question 18

Multiple Choice

The mass enclosed in any orbit can be estimated from the equation M(<r) = v2r / G. If the quantity v is constant, regardless of radius, where is the mass located?

• A)The mass is concentrated in the center.
• B)The mass is spread out over large radius.
• C)The mass is distributed like a doughnut, with a hole in the center.
• D)Cannot be determined from the information given.

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