If the Rotational Speed of the Gas in the Disk

question 44

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 then what fraction of the galaxy's mass is made of dark matter?

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Definitions:

Extraversion/Introversion

Personality traits that describe the social preferences of individuals, with extraversion indicating a preference for external stimulation and social interaction, and introversion indicating a preference for solitude and internal experiences.

Overaroused

A state of heightened physiological and psychological activity, often leading to stress, anxiety, or heightened sensory sensitivity.

Frontal Lobes

Regions of the brain located at the front part of the cerebral cortex, responsible for executive functions, decision making, controlling impulses, and emotional expression.

Extraversion Dimension

A personality trait characterized by sociability, talkativeness, assertiveness, and excitability, denoting how outgoing and social an individual is.