magnetic water? and a question or 2 about ions

Borek

Just because magnetic field is constant doesn't mean magnetic flux through the circuit inside of the frog is constant. Quite the opposite - frog is moving, so the flux must be changing.

wil3

Whoa, I never even considered that! Does it matter that the most of the frog's motions are in the same plane (ie, it waves its arms around, but it does not move up and down). Because since most of the motion is lateral, doesn't that mean the flux (which is relative to the plane) does not change?

Borek

Look at the flux definition - while there exist movements that mean constant flux, any wobbling must lead to flux changes. Muscle contraction - that leads to cross section change - must mean flux change. And so on.

wil3

Oh, okay! So because the frog is wobbling, and not just shifting left and right, that means that the area intersecting the field is changing, altering the flux. I see what you mean- thanks! : ]

another idiot

i would have to say that the electromagnet CAN BE a DC device, but doesn't neccessarily have to be driven by a constant DC... what about a coil driven by a unidirectional pulse signal?... a coil doesn't have to produce a steady constant magnetic field, and in the system that i describe, it doesn't...

another idiot

i'm glad i'm not that frog though...

wil3

Oh, lol, I meant that this particular electromagnet would have been a high current constant signal DC device. I mean, of course there are different DC signals that can be used in the coil, but in general most electromagnets being used for their brute strength tend to be straight DC.

And I agree, I am glad I am not the frog as well. I am also glad I am not the monkey that NASA sent into space, or the sheep scientists practiced cloning with.

another idiot

perhaps i should put together a vid or picture clearly showing the system i'm wondering about. will get back to you all with that one...
but then again maybe i should just build the thing and see if it works... after all, the scientific method is to test a theory by experiment, not just to ask other people if a thing could work... if i ever track down the parts i need to make it i'll have to give it a go...

chem123

I encoutered a company a couple of years ago that was making water and oil emulsions by passing the coarse oil and water mixture through a magnetic field. Very simple device that did produce oil and water emulsions but their stability was not nearly as good as those produced by coventional high pressure emulsification techniques. I enquired to the company about how in fact the emulsification process was working inside the magnetic field and they mentioned something about the magnetic properites of water. They were very vague.
After seeing the device work, it seemed to me that the location of the magnetic field was just a more contstricted portion of the emulsification cycle through the device and the emulsification was purely mechanical. But I dont know, the company apparently had PhD research being done on the device. Food for thought.

Borek

I won't quote a source now, but I have read a paper in the peer reviewed journal about use of magnetic field for scale protection - they have found that magnetic field starts deposition of scale not on the internal tubes surface, but in the water volume, so it is easier to remove. Or something like that - I don't remember details

another idiot

i thought you didn't like my magnetic water question Borek... glad to see you're still taking an interest. i guess i could have phrased it better though...
back on the subject of funny videos did you ever see this version of the hutchison effect? it's a classic, i love this video...

http://www.youtube.com/watch?v=C8pTi...ture=fvw&pos=0

LawrenceM

Is there a floating frog forum in here? or can someone start one? I need to brush up on my dimagnatism theory.