Using an Orbit Size of 8 Kpc, and a Period $10^6$

question 3

Multiple Choice

Using an orbit size of 8 kpc, and a period of 225 million years, the mass of our Galaxy isfound to be closest to:

• A) \(10^6\) solar masses.
• B) \(10 ^ { 8 }\) solar masses.
• C) \(10^{10}\) solar masses.
• D) \(10^{11}\) solar masses.
• E) \(10^{12}\) solar masses.

---

Definitions:

Through-beam Sensor

A type of photoelectric sensor where the emitter and receiver are positioned opposite each other, detecting objects when the beam is interrupted.

Sensing Range

The distance within which a sensor can detect the presence of an object or a signal.

NC Pushbutton

A Normally Closed pushbutton switch that makes contact (closes) when at rest and breaks the circuit when pressed.