Consider a white dwarf star that has a thin, high-opacity, and non-degenerate shell at an effective temperature of 28000 K. Mass of the white dwarf is one solar mass and the radius of this star is 10 times the solar radius. This white dwarf possesses non-degenerate carbon nuclei and high momentum at a temperature of 50000 K. Calculate the kelvin-Helmholtz time scale of this white dwarf. (a) 3.04x10 yrs (b) 4.24 x100 yrs (c) 5.6x1010 yrs (d) 9.38x10 yrs

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