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_\(\odot\)

---

Definitions:

Company Policies

Official rules or guidelines established by an organization to dictate behavior and decision-making within the company.

Written Communication

The process of conveying messages or information through written symbols, including letters, emails, and reports.

Capital Letters

Uppercase letters used in writing for emphasizing, starting sentences, and proper nouns.

Ineffective Writers

Individuals who struggle with composing text in a clear, concise, or engaging manner, often resulting in poor communication.