As a white dwarf cools, its radius will not change because a. pressure resulting from 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.

As a white dwarf cools, its radius will not change because a. pressure resulting from 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.

	a.	pressure resulting from 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.