A Main-Sequence Star Can Be No Smaller Than 0

question 283

Multiple Choice

A main-sequence star can be no smaller than 0.08 solar mass.The reason is that:

• A) thermonuclear reactions begin so suddenly in stars of less than 0.08 solar mass that the star is disrupted by an explosion.
• B) protostars of less than 0.08 solar mass cannot form.
• C) protostars of less than 0.08 solar mass are not massive enough to contract.
• D) the temperature in a contracting protostar of less than 0.08 solar mass does not become high enough for nuclear reactions to start.

Understand and explain the developmental processes and patterns (e.g., deuterostomy) in animals.

Compare and contrast the modes of reproduction, development, and life cycles among various animal groups.

Understand the adaptations and evolutionary traits shared by closely related animal groups and their ecological implications.

Comprehend the structural, physiological, and behavioral adaptations animals have developed to survive and reproduce.

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Definitions:

Gross Profit

The difference between sales revenue and the cost of goods sold, indicating the efficiency of a company's core operations.

Fixed Costs

A repetitive charge that does not fluctuate with the volume of business activity, including expenses like lease payments and utility bills.

Contribution Margin

The amount of revenue remaining after deducting variable costs, used to cover fixed costs and generate profit.

Variable Costing Income Statement

A financial statement that includes only variable production costs (direct materials, direct labor, and variable manufacturing overhead) in the cost of goods sold and separates fixed overhead costs as period costs.