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In the section 40Hz there is a sentence that purports that 5000 alterations per minute are 41 and two thirds Hertz, but I don't understand how this can be the case. Hertz being the number of alterations in a second meaning that in one minute at 1 hertz there would be 60 alterations.

Conversely, 5000 alterations in a minute would correspond to 83 and 1/3 Hertz Aethalides ( talk) 18:58, 15 April 2024 (UTC) reply

Maybe 5000 RPM with a four-pole machine? Removed, in any case. Constant314 ( talk) 20:08, 15 April 2024 (UTC) reply

"alterations" includes plus swings and minus swings and is twice the number of cycles in 1 minute. -- Wtshymanski ( talk) 22:42, 22 April 2024 (UTC) reply

Thanks for the explanation. I would have never guessed that. Can you add a note? Constant314 ( talk) 23:03, 22 April 2024 (UTC) reply

can you find a citation for that because as I understand it, Hertz is number of alterations per seconds i.e.50hz is 50 alterations, not 100 Aethalides ( talk) 06:02, 23 April 2024 (UTC) reply

"Hertz" is the number of *cycles* per second, a cycle has a positive swing and a negative swing -two alterations. I will try to track down the musty book that I had explaining this, but the mildew may have gotten to it. Google Books used to have complete text of century-old periodicals but now shows only useless snippets. -- Wtshymanski ( talk) 02:03, 15 May 2024 (UTC) reply