What nuclear reaction is the energy source of a white dwarf?

Multiple choice answer would be "None"

Explanation:

White dwarfs are radiating stored heat from earlier reactions.  

Technically, it would be the last fusion stage the star went through  

BEFORE it became a white dwarf, but that's nit-picking.

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

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