As a White Dwarf Cools Its Radius Does Not Change

question 29

Multiple Choice

As a white dwarf cools its radius does not change because

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

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Definitions:

Digestive System

is a series of organs that convert food into essential nutrients that are absorbed into the body and eliminate unused waste material.

Rectum

The final section of the large intestine, terminating at the anus, where stool is stored before being expelled from the body.

Pancreatic Enzymes

Digestive enzymes produced by the pancreas that aid in the breakdown of fats, proteins, and carbohydrates in the intestine.

Trypsin

An enzyme produced by the pancreas that helps in the digestion of proteins in the small intestine.