After-Orts #24
"Aristotle's Wheel Paradox" made my brain hurt:
https://youtu.be/mW-0bZwoGwQ
Some good clues toward an explanation are here:
https://www.wolframcloud.com/objects/demonstrations/AristotlesWheelParadox-source.nb
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- The "15 Puzzle" Helps Unlock the Secrets of Magnetism -
-- Quanta Magazine, Jan. 24, 2019
https://www.quantamagazine.org/a-childs-puzzle-has-helped-unlock-the-secrets-of-magnetism-20190124
Choice quote: "Now take away one electron. What remains is a vacancy called a hole."
I'm so glad I didn't die on the various occasions I have earnestly wished I might, for I would have missed a lot of lovely weather.
— Elizabeth von Arnim (1866–1941), in a letter to Maud Ritchie, quoted by Deborah Kellaway in the introduction to The Solitary Summer, Virago: 1993