Answer to Question #110872 in Inorganic Chemistry for Balogun Raheem

Question #110872
suppose a uniform spherical star of mass M and radius R collapses to a uniform sphere of radius 10^-5 .If the original star had a rotation rate of 1 rev each 25 days(as does the sun) ,what will be the rotation rate of the resulting object
Expert's answer

Angular Momentum Conservation: In the absence of an external torque, the net angular momentum of a system remains conserved.

The Moment-of-Inertia of a sphere of mass M and radius R spinning along an axis passing through its centre is :

now applying momentum conservation

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Assignment Expert
28.04.20, 19:36

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Balogun Raheem
21.04.20, 16:34

Thank you very much

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