What Is an Ionization Nebula

question 87

Multiple Choice

What is an ionization nebula?

• A)a region of very hot,low-density gas surrounding a recent supernova
• B)a clump of gas that will soon give birth to a new star
• C)a colorful cloud of gas that glows because it is heated by light from nearby hot stars
• D)a name sometimes used to describe spiral galaxies besides the Milky Way

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Definitions:

Perfect Substitutes

Goods or services that can be used in place of one another with no loss of utility or satisfaction.

Income Effect

Refers to adjustments in consumer behavior as a result of changes in purchasing power, influencing the demand for products and services.

Substitution Effect

The change in consumption patterns due to a change in relative prices, where consumers substitute a cheaper alternative for a more expensive good.

Price

The cash value expected, required, or contributed in transaction for an item.