What happens if you spin a sphere really fast in water? Imagine a ball bearing spinning at 1000 miles per hour in a clear glass container? How would the “currents” look?

Hmmm I can’t say I know that. You mean spin a solid sphere inside water? And the currents around the ball? How do you spin it without effecting the currents or water?

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Yes,that is exactly what I mean. I don’t have an answer myself on how to get the ball spinning.

Sounds pretty tough.