What Surprising Conclusion About the Distribution of Mass in Our

question 96

Multiple Choice

What surprising conclusion about the distribution of mass in our Galaxy has resulted from a study of orbital speeds across the galactic disk?

• A) Most of the mass in the Galaxy is dark and is detected only by its gravitational influence.
• B) Most of the mass of the Galaxy is in the form of hydrogen gas and giant molecular clouds in the outer region beyond the Sun's orbit.
• C) Most of the Galaxy's mass is concentrated in a supermassive nucleus at the center of the Galaxy.
• D) Most of the mass in the Galaxy is in the form of O and B stars.

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Definitions:

Going Prices

Refers to the current prices at which goods or services are being sold in the market.

Net Demander

An entity or individual that consumes or requires more of a good or service than they produce or provide.

Inferior Good

A type of good for which demand decreases as the income of the consumer increases, contrary to what happens with a normal good.

Net Supplier

An entity that provides more of a good or service to the market than it consumes from it.