Sagittarius A*, the Radio Source Located at the Center of Our

question 42

Multiple Choice

Sagittarius A*, the radio source located at the center of our galaxy, is believed to be:

• A) a massive star cluster
• B) a supernova remnant
• C) a quasar
• D) a Seyfert nucleus
• E) a supermassive black hole

---

Definitions:

Marginal Cost

The price of manufacturing an additional unit of a product or service.

Shutdown

A short-term decision by a company to cease operations due to unfavorable market conditions, aiming to minimize losses.

Short-Run Supply Curve

A graph that shows the relationship between the price of a good and the quantity of that good supplied by producers over a short period, where some inputs are fixed.

Long-Run Supply Curve

A graphical representation showing how the quantity supplied of a good or service varies with price over a long period, when all inputs can be varied.