What Critical Event Transforms a Protostar into a Normal Main-Sequence

question 50

Multiple Choice

What critical event transforms a protostar into a normal main-sequence star?

• A) Planets form in the accretion disk.
• B) The star grows suddenly larger in radius.
• C) Triple-alpha reactions begin in the core.
• D) Nuclear fusion begins in the core.
• E) Convection begins throughout the star's interior.

---

Definitions:

AVC Curve

A graphical depiction of the average variable costs incurred by a firm in the short run, illustrating how costs vary with output levels.

AFC Curve

A graph representing Average Fixed Costs, which shows how fixed costs per unit of output decrease as production increases.

Total Cost Function

An equation that expresses the total cost of producing a given quantity of output, considering both fixed and variable costs.

Average Total Cost

The total cost of production divided by the number of units produced, signifying the cost per unit of output.