Today, Astronomers Find Compelling Evidence That the Energy Source of the Quasars

question 6

Multiple Choice

Today, astronomers find compelling evidence that the energy source of the quasars and active galaxies is

• A) antimatter and matter colliding at the center of a galaxy
• B) chain reactions of supernova explosions
• C) matter falling toward a supermassive black hole at the center of a galaxy
• D) the left-over (and stored) energy of the big bang explosion
• E) you can't fool me; astronomers have no explanation for what the energy source is for the quasars -- they are completely baffled

---

Definitions:

Economic Profits

The variance between total financial gains and total charges, taking into account both manifest and implied costs.

Long Run

A time frame during which all production elements and expenses can change, enabling complete adjustment within the industry to any alterations.

Total Revenue

The total amount of money a firm receives from sales of its products or services, before any costs are subtracted.

Profit-Maximizing

The process or goal of a firm to adjust its production and pricing strategies to achieve the highest possible profit.