Answered: Star Trillian-2009 was initially… | bartleby

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Star Trillian-2009 was initially observed by astronomers to spin with a
period of 25 days, and was computed to have a rotational inertia of
23.81 IARIU (International Astronomical Rotational Inertia Units). It
then undergoes a change, and the new rotational inertia is calculated to
be a third of the original value.
What is the new rotational period of the star?

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