directional cables?

And here's a picture for you too.

Alternating Flow Schematic (courtesy of the Princeton, Indiana Wastewater Treatment Plant)

Nice try but none of your examples as far as I can see is talking about periodic motion. For instance "Single needle ALTERNATING FLOW blood pump system" is talking about a dialysis system that draws blood through a tube for some period of time, treats it, and then puts the blood back into the body via the same tube. "The science of swara yoga deals directly with this ALTERNATING FLOW of forces" is talking about breathing through one nostril some of the time and the other nostril the rest of the time. Some others are systems where one chamber or tube has something flowing one way while another chamber or tube it flows the other way, or a system that injects two streams into a chamber to create swirls in opposing directions to mix something. None of that is periodic. Your examples are like saying that a divided highway has periodic motion because it has alternating flows of cars

Your switch example is describing periodic motion. If you want to describe what is happening it makes no sense to say that I kept flipping the switch and the electrons flowed. If you want to accurately describe what is happening you must say something like each time I flipped the switch the flow reversed. See the pattern? It is impossible to accurately describe something periodic using the word flow unless you qualify it with something like "back and forth" or "one way and then the other" or something similar. The tide doesn't flow, it ebbs and flows. Your yoga reference says "breath flowing in and out through our nose."

You still haven't given a single example besides AC where flow is used to describe periodic motion without using something like back and forth to indicate the flow changed direction.

I challenged you to give me an example of a stream of anything that vibrates about a fixed point. You can't do it.

You laid down the gauntlet with your definition which I systematically picked apart word by word and gave a slew of examples that show "definite motion" is one direction after you insisted it could be back and forth. I asked you to give a single example where it did not. You can't do it. Instead you come up with alternating flow used in a way that is completely unrelated to the periodic motion we're discussing.

Q, quit trying to change the English language. Flow denotes movement in a definite direction and no amount of word play on your part is going to change that. It's been fun but it looks like you have run out of ideas.

Sorry I got snippy.

.

One more time.

I flip the switch one way for ten seconds.

Question: Is there "current" "flowing" during that ten seconds?

I flip the switch the other day for ten seconds.

Question: Is there "curren" "flowing" during that ten seconds?

Two simple questions requiring nothing more than two simple, straightforward answers. Yet in spite of my having asked them several times so far, you've danced around and done everything you can to avoid answering them. Either there is "current" "flowing" during those ten seconds, or there isn't.

Which is it?

Hey! Get in line! I still have two questions pending. ;-)