What Is the Basic Shape of a Spiral Galaxy

question 220

Multiple Choice

What is the basic shape of a spiral galaxy?

• A) a round, flat disk with long lanes of stars that curve outward from a round, nuclear region of uniform brightness
• B) a round, flat disk with long lanes of stars that curve outward from the center of the galaxy
• C) approximately spherical with long lanes of dark dust clouds curving through it in a spiral pattern
• D) a round, thin disk of uniform brightness with its edges bent up and down into a spiral shape

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Definitions:

Kinked-demand Curve Model

An economic model that suggests prices in an oligopoly are stable because firms will match price decreases but not price increases by competitors.

Marginal Revenue Curve

Represents the additional income gained from selling one more unit of a product or service, crucial for determining optimal production levels in microeconomics.

Marginal Cost

The boost in aggregate costs that comes from generating one extra unit of a product or service.