As a White Dwarf Cools, Its Radius Remains the Same

question 4

Multiple Choice

As a white dwarf cools, its radius remains the same. Why is this?

• A) because pressure due to nuclear reactions in a shell just below the surface keeps it from collapsing
• B) because pressure does not depend on temperature for a white dwarf, since the electrons are degenerate
• C) because pressure does not depend on temperature, since the star has exhausted all its nuclear fuels
• D) because material accreting onto it from a companion maintains a constant radius

---

Definitions:

Lifestyle Aspiration

The goals or standards of living that an individual or group strives to achieve, often influenced by cultural, social, and economic factors.

Considerable Equity

Significant ownership interest or stake in an asset or company, often implying a large amount of invested capital or value.

Brand Awareness

The extent to which consumers recognize and are familiar with a brand and its products or services.

Increasing Depth

Enhancing the range or complexity of a topic, product line, or area of knowledge to provide more detail or options.