The strands are in contact with one another, so don’t they therefore act, electrically, like a single wire of 1 m? The description above would be clearly true if each strand were insulated, but otherwise won’t current tend to take the path of least resistance, a straight line, rather than following the twist of each strand for a length of 1.03 m?
The area of contact between each strand is pretty small (and therefore the contact resistance is pretty high), so you won’t see a lot of current jumping from one strand to the next. If you want to minimize/eliminate that contact resistance, you’d need the largest possible contact area, which means eliminating the air gaps between the strands - at which point you’ve arrived at the competing solid-wire configuration.
I think the skin effect Skin effect - Wikipedia will have a greater effect on the resistance.
Skin effect is negligible at frequencies below several hundred kHz, and all but nonexistent below 100kHz… all audiophile raving to the contrary.
Most high-power circuits where wiring resistance would matter operate at very low frequencies, if not zero (DC).
A basic electricity fact that most people don’t know-
The plus and minus symbols on batteries are wrong.
For a long time, nobody was sure which way electricity flowed in a circuit. So, a scientist set up a device where a spark jumped from one side to the other. He observed until he was sure which direction the spark traveled.
He got it wrong.
But, it was a few centuries before anybody figured that out.
Huh. I’m not sure if I knew that rubies and sapphire were made of Aluminum oxide. (And it looks like not all aluminum oxide is sapphire; it has to form in the right crystal structure.)
The detail I like is this: Iron oxide rust is reddish and brittle, with a tendency to crumble off the iron item and reveal fresh iron to be attacked by oxygen. Aluminum oxide that forms on an aluminum object will generally be the same color as aluminum, tougher and stronger than the pure metal. So it protects the item from further oxidation 
Russians have always referred to it as “the Northern Capital,” regardless of Moscow’s status.
Like other things in nature, you can “see” it (perhaps “observe” would be a better word) by the effect it has on its immediate environment.
Now I - even I - would celebrate
In rhymes unapt the great
Immortal Syracusan rivaled nevermore
Who in his wondrous lore
Passed on before
Gave men his guidance how to circles mensurate.
3.141592653589793238462643383279
Seriously, is it too much to ask that people be completely up to date on a thread before they respond to it?
The tongue of the giraffe is prehensile.
The pig has a corkscrew penis (The Master covered this).
The male platypus has venomous spurs in his hind legs.
The female platypus does not express milk through nipples. She sweats it out through her pores.
The male seahorse carries fertilized eggs in a pouch.
Unoxygenated spider blood is clear. Oxygenated spider blood is translucent blue.
Lisbon? Unless being like 1 degree of latitude off doesn’t qualify as “due east”.
Not sure why this is supposed to be an interest/great science fact either, doesn’t seem surprising, except for the Lisbon thing.
My own contribution: the only time elements heavier than iron are created are during the last moment of a star’s death. So all of the heavy elements in the world, including the ones in your body, are the result of a dying star.
No, that’s not what I am talking about.
Look at this pic. Notice how there is an overall corkscrew (helix) to the wire? That is because someone twisted the wire. As they were twisting the wire, a slight overal helix started to form and the wire got “shorter” at the same time, i.e. the distance between each end of the wire decreased. The wire “contracted” in a sense. But it didn’t *really *get shorter from an *electrical *standpoint; the actually path length remained unchanged.
So if I have 1 meter of stranded wire, as measured with a simple tape measure, I am simply measuring the distance between the two ends. But because there is a slight overall helix to the wire (which is so subtle that it is difficult for your eyes to see), the actual, electrical length of the wire is slightly more than 1 meter. Even at DC.
This is something very few electrical engineers know.
…
No I am not assuming current follows along each strand, because that does not happen, obviously. The strands are not isolated from each other.
Read my post above over and over, and keep looking at the linked pic. You will eventually understand the effect I am talking about.
And don’t feel bad if you don’t understand it right away. It also took me a long time to understand the effect.
:rolleyes: Then I can see/observe gaseous oxygen and nitrogen by the effect they have on trees, flags, grass, and other objects that get jostled around by the wind. In fact, I can see/observe water vapor in the same way, since it’s already in the atmosphere as humidity.
I hereby dismiss your “great science fact” as nothing more than semantic subterfuge.
Band name!
Sloths nearly always climb down to the base of a tree in order to eliminate. There is no obvious reason why they do it this way.
My understanding is that sloths, or at least some species, hold it until it rains, and then let go - possibly to disguise their presence. I read an article years ago about a couple who had one as a pet? rescue? research animal? and had to spray a hose over it a couple of times a day so it would poop.