1. The problem statement, all variables and given/known data A star with mass 2.4x1030 kg and diameter 1.7x109 m rotates once every 34 earth days. It eventually dies and becomes a white dwarf, shedding about half of its mass and contracting to a diameter of 1.9x108 m. If we approximate the star as a perfect sphere, what is its resulting angular velocity? Initial star r = 8.5x108 m Initial star m = 2.4x1030 kg Initial star ω = 1 rev/34 days = 1.85x107 rad/s White dwarf r = 9.5x107 m 2. Relevant equations I=(2/5)MR2 3. The attempt at a solution I'm getting really stuck on this one. I can determine I for the initial star (I=(2/5)(2.4x1030 kg)(8.5x108)2 m=6.94x1047 kgxm2, but from there I'm not sure where to go. I'm not even sure if that's relevant. I'm not looking for a handout here, but any guidance would be appreciated!