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

question 55

Multiple Choice

The mass enclosed in any orbit can be estimated from the equation M(<r) =v²r/ G. If the quantity (v²r) 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) Cannot be determined from the information given.
• D) The mass is distributed like a doughnut, with a hole in the center.

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