How is speed of rotation of Earth's Inner Core calculated?

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The discussion revolves around seeking both a simple and a detailed explanation of a specific topic, likely related to core spin in physics, as indicated by the provided link to a Columbia University archive. Participants express gratitude for helpful resources and emphasize the importance of understanding the mathematical principles underlying the subject. The conversation highlights a desire for clarity and depth in explanations, suggesting that both novice and advanced insights are valued.
RJLiberator
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I am interested in this.

I'm looking for a simple answer and a more in depth answer (if possible).

Any links regarding the math behind it would be great.

Thank you.
 
Earth sciences news on Phys.org
Thank you kindly for this helpful link.
 

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