Is there a liquid which is attracted by magnet at room temp.

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Discussion Overview

The discussion centers around the question of whether there exists a liquid at room temperature that is attracted by a magnet and whose constituents do not separate. Participants explore various examples and properties of magnetic liquids.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about a liquid that meets specific criteria of being attracted to a magnet without separation of its constituents.
  • Another participant mentions ferrofluids as a type of liquid that is attracted to magnets, describing their composition and behavior, but expresses uncertainty about whether they fully meet the requirement of not separating.
  • A participant suggests mercury as a potential candidate, although this claim is later challenged.
  • There is a clarification regarding the temperature of liquid oxygen, which is noted to be very cold, thus not fitting the room temperature criterion.
  • One participant asserts that mercury is not attracted to magnets and reiterates that magnetic colloids like ferrofluids are likely the best option, discussing the behavior of nanoscale particles in such fluids.
  • Another participant elaborates on the behavior of particles in ferrofluids, explaining how they form spikes in response to magnetic fields, which visually represent magnetic field lines.

Areas of Agreement / Disagreement

Participants generally agree that ferrofluids are a suitable example of a magnetic liquid, but there is disagreement regarding the suitability of mercury and the interpretation of the original question about separation of constituents.

Contextual Notes

There are unresolved questions regarding the specific requirements for the liquid's behavior and the definitions of terms like "attraction" and "separation." The discussion also reflects varying levels of familiarity with the properties of ferrofluids and magnetic materials.

vishnukorde
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please tell the name of a liquid (at room temperature) which is attracted by a magnet. and its constituents does not get separated.
 
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there are such a liquid called ferro fluids. you can look at videos of them and their interaction on youtube easy. just search ferro fluid. its kind of cool.
apparently it stains things pretty easy and will never come off the magnet
it is essentally a whole bunch of little ground up magnets in a liquid.
it forms the magnetic field that it is in.
kinda neat stuff.
i don't know whither it meets your "constituents does not get separated" requirement.
 
mercury.
 
do you mean the liquid is at room temperature? I'm pretty sure liquid oxygen is but that would be very cold :-/
 
Mercury is not going to be attracted to a magnet. Magnetic colloids (ferro fluids), as taylaron mentioned, are likely your best bet. Since the particles are nanoscale, they probably wouldn't settle or separate too much due to Brownian motion and such. Then again, I've never worked with the stuff.

I'm also curious - wouldn't each particle act as a dipole by itself? And how would that relate to the affect of a magnet? I think I recall seeing "spikey shapes" emerge from the fluid when exposed to a magnet.
 
there are millions of tiny magnets imbedded in this fluid, each one of them is attracted to the nearest field line produced by the magnet. those 'spikes' are their attempt to follow it. Its a great way to display magnetic field lines
 

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