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

question 35

Multiple Choice

If the rotational speed of the gas in the disk of a spiral galaxy is 200 km/s at a distance of 80,000 light-years from its center,then what is the mass enclosed within this radius?

• A) 7.5 billion M_\(\odot\)
• B) 18 billion M_\(\odot\)
• C) 70 billion M_\(\odot\)
• D) 230 billion M_\(\odot\)

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Definitions:

Durkheim

A French sociologist, Emile Durkheim, who is considered one of the founding fathers of sociology, emphasized the importance of social institutions and structures in influencing human behavior and social solidarity.

Totem

A natural object, animal, or phenomenon regarded as a symbol representing clans, tribes, or families, carrying spiritual or cultural significance.

Durkheim

Emile Durkheim was a pioneering French sociologist who made significant contributions to the study of social structures, collective consciousness, and the role of societal norms and institutions.

Ritual

A set of fixed actions and sometimes words performed regularly, especially as part of a religious or cultural ceremony.