If You Observed a Gas Cloud Orbiting in a Disk $\odot$

question 42

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 _\(\odot\)
• B) 2 * 10¹¹ M _\(\odot\)
• C) 8 *10¹¹ M _\(\odot\)
• D) 1 * 10¹² M _\(\odot\)
• E) 4 * 10¹² M _\(\odot\)

---

Definitions:

Stress Reduction

A variety of techniques and methods aimed at decreasing psychological or physical stress.

Immune System

The complex network of cells, tissues, and organs in the body that defends against infections, diseases, and foreign substances.

Sense of Taste

One of the five senses, involving the ability to detect flavors through taste buds in the mouth.

Spoiled Food

Food that has gone bad due to bacteria, mold, or yeast growth, making it unsafe to eat and potentially causing illness.