What Would You Need to Measure About a Planetary Nebula

question 68

Multiple Choice

What would you need to measure about a planetary nebula to determine how long ago its parent star died?

• A) the mass of the white dwarf
• B) the mass and radius of the white dwarf
• C) the nebula's temperature and radius
• D) the nebula's radius and expansion velocity
• E) the composition of the gas in the nebula

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Definitions:

Collusion

An agreement, usually secretive, between two or more parties to limit competition and manipulate prices for their benefit.

Quantity Output

The total amount of goods or services produced by a business, sector, or economy.

Noncooperative Behavior

Actions by firms that ignore the effects of those actions on the profits of other firms.

Marginal Costs

The cost incurred by producing one additional unit of a product.