If the Rotational Speed of the Gas in the Disk $\odot$

question 5

Essay

If the rotational speed of the gas in the disk of a spiral galaxy is 100 km/s at a distance of 26,000 light-years from its center,then what is the mass enclosed within this radius? If the mass of luminous matter inside this radius is 5 billion M _$\odot$ then what fraction of the galaxy's mass is made of dark matter?

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Definitions:

Fraud Or Misrepresentation

Deliberate deception to secure unfair or unlawful gain, or the act of misleading or deceiving someone.

Duress

Coercion or pressure unlawfully applied to force someone to act in a manner they otherwise would not.

Additional $500

An extra amount of five hundred dollars added to a transaction or financial agreement.

Real Basis

The fundamental or underlying reason or foundation for something.