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zubir jangsi
Attended Mahsa University College
Lives in Kuching
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I've been seeing similar gifs to this one all over G+ over the last few weeks, so I decided to post one on here to give an explanation as to what is actually happening.

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
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zubir jangsi

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Awesome
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weekang dulu sekali
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Have him in circles
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zubir jangsi

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Cat sitting on an air vent…
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What you see here isn't a magic trick or illusion of any sort, the water droplets and later the beads actually are floating in the air. This phenomena is called "*Acoustic levitation*", where matter can be suspended in air (or any other sort of medium) via the use of acoustic radiation pressures from intense sound waves bombarding into the subjects at hand.

Intense sound waves do not have effects that are linear, that is to say the output of a system isn't directly proportional to the input into a system, ultimately making acoustic levitation possible. Some methods of the levitation can lift objects without making any sounds that the human ear can hear, and others do produce sound.

Essentially these subjects, the water droplets or beads or anything for that matter, are being bombarded with enough sound waves to cause them to not fall. One such way in which sound waves can be focused is by the use of a transducer (a surface that vibrates and makes the sound) and a reflector (a surface that reflects the already-made sound back towards the source). 

The sound waves produced are longitudinal pressure waves, that move parallel to the direction they move along. These waves can bounce off other surfaces, following the law of reflections for sounds. The compressions of these waves sometimes meet rarefactions (reduction in the wave's density) and can combine to cause what is called a standing wave.

Standing waves seem to vibrate in place rather than flow from one place to another, giving an illusion of standing in place. With the right positioning of the transducer and reflector, and creating a sound wave that is parallel to gravity, the acoustic levitator creates a standing wave with some parts having a constant downward pressure, and other parts having constant upward pressure. This ensures that the subjects don't have a lot of pressure affecting them, ultimately causing them to levitate in a field of sound.

A longer, more detailed explanation of acoustic levitation here: http://science.howstuffworks.com/acoustic-levitation1.htm

YouTube video source for the gif: Acoustic levitation

YouTube video of acoustic levitation, and as well as manipulation of objects suspended in air: Three-Dimensional Mid-Air Acoustic Manipulation [Acoustic Levitation] (2013,2014-)

Real world usage for such a technique: http://www.anl.gov/articles/no-magic-show-real-world-levitation-inspire-better-pharmaceuticals
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zubir jangsi

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Now i know why there must 'wait' in LEGEN...DARY

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a very wise man. nampak ilmu yg dia ada bkn tipu. memang sgt penting ulamak memahami hakikat kehidupan.
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