(submitted by Frank)
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Photo1 is a memorial to the folks who developed the water to electricity analogy at an obscure laboratory in lower Bezerkistan in the early part of the 20th century.

[Linked Image from electrical-photos.com]

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Photo2 shows how many of us got our first experience with electricity.
Now we know why the unit Hertz is used, because that is what it does....60 times a second.....

Frank

[Linked Image from electrical-photos.com]