(Solved): The star HD 69830 s mass is 1.71030kg, its radius is 6.3105km, and it has a rotational p ...

The star HD $69830^{?}$ s mass is $1.7\times 10^{30}\mathrm{kg}$, its radius is $6.3\times 10^5\mathrm{km}$, and it has a rotational period of approximately 35 days. If HD 69830 should collapse into a white dwarf of radius $7.9\times 10^3\mathrm{km}$, what would its period (in s) be if no mass were ejected and a sphere of uniform density can model HD 69830 both before and after? 5