If You Observed a Gas Cloud Orbiting in a Disk

question 16

Multiple Choice

If you observed a gas cloud orbiting in a disk of a spiral galaxy that was located 10,000 pc from the center and it rotated with a speed of 300 km/s,what is the mass of the galaxy interior to gas cloud's orbit?

• A)1 × 10¹¹ M_⨀
• B)2 × 10¹¹ M_⨀
• C)8 × 10¹¹ M_⨀
• D)1 × 10¹² M_⨀
• E)4 × 10¹² M_⨀

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Definitions:

Ego

The aspect of self that directs one’s thoughts and actions.

Solo Status

The situation in which an individual is the only representative of their social group in a specific context, often increasing visibility and pressure on the individual.

Social Role

Expected patterns of behavior associated with individuals occupying particular positions or statuses within a group or society.

Self-concept

An individual's perception of self, encompassing beliefs, attributes, and who and what the self is.