What you see here is called a ferromagnetic fluid, or "ferrofluid". They are essentially microscopic magnetic particles that are spread throughout a solvent of some sort, like water, and are coated with materials that act to reduce the mixtures' surface tension. These coatings are known as "surfactants", and are there to prevent the particles from clumping together, making a "colloidal mixture".
After the ferrofluid has been made, it can be made to act in very interesting ways (as shown in the gif) in the presence of a magnetic field, because it becomes strongly magnetized. Then it can form different shapes, separate from larger groups, and do other very neat things depending on the force of the induced magnetic field it's being exposed to. These microparticles have such weak magnetic attractions between them that it's very easy to keep them from clumping, which is why you can see it changing shape in the gif so "effortlessly".
However, after the induced magnetic field is taken away, the ferrofluid goes back to its original form, because they do not retain the magnetization, so they can't stay in their new-formed shapes--without a constant magnetic field being applied to them.
More information on ferrofluids: http://en.wikipedia.org/wiki/Ferrofluid
Youtube video detailing this phenomena: Ferrofluid Sculpture
Ferrofluid uses, characteristics, and uses: http://education.mrsec.wisc.edu/modules/HighSchool/ferrofluid/Ferrofluids-Background.pdf
The polar vortex is going to swing back down to hit the northern states yet again. It is likely that these kinds of unbearable winters will become the new normal. This is going to make some people want to move out of the north to avoid these extreme winter. Don't mistake a higher migration to the south as proof people want lower taxes and to live in shitty southern towns. Nobody actually likes you. We just like the cold even less.
Guess who was right?
- Student, 2008 - present
- Hill-Rom Inc.
- Gecom Corp.
- Starbucks Coffee
- Ohrenstein & Brown, LLP
- Delta Faucet
- Ivy Tech Community Collegepresent
- Middlebury College
- Indiana University - Purdue University at Columbus
- All Hallows High School
- Christ the King Elementary School
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