The Sun's mass is 2.0×1030 kg, its radius is 7.0×105 km, and it has a

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The Sun's mass is 2.0×1030 kg, its radius is 7.0×105 km, and it has a rotational period of approximately 28 days. If the Sun should collapse into a white dwarf of radius 3.5×103 km, what would its period be if no mass were ejected and a sphere of uniform density can model the Sun both before and after?

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The Sun's mass is $2.0 \times 10^{30} k g$ , its radius is $7.0 \times 10^{5} k m$ , and it has a rotational period of approximately 28 days. If the Sun should collapse into a white dwarf of radius $3.5 \times 10^{3} k m$ , what would its period be if no mass were ejected and a sphere of uniform density can model the Sun both before and after?