Put some cornstarch on a speaker, turn up the volume, and if the frequency is low enough you can get one of these little puppies! Looks like it's alive! Enjoy!

I actually don't think this is an effective way to drive cars, but it actually depends on the amount of energy which that wave generator requires, and how much energy it is produced by burning that salt water. In other words, some data about the efficiency of the whole apparatus, should be mentioned!

Here's another cornstarch and water solution, which becomes a non-newtonian fluid. A Non-Newtonian fluid, has properties that cannot be described by classical fluids. In this video clip, the non-newtonian fluid is a mixture of corn starch and water.

An awesome video of a sound resonance experiment. By raising the wavelength of the sound beautiful patterns (and more complex) appear in the powder. Just another demonstration that physics can be beautiful Also check out this Fire Spectroscope Video. It's also awesome.

An amazing material was developed by Chinese scientists which is composed of carbon nanotube films and has a possible application (among otther) to produce the world's thinnest speakers. Nanotubes, are a new carbon breed of material, which is 1000 times smaller than the width of a hair and can give sound with the "same quality of conventional speakers". This, however, does not require magnets of any sort or moving parts for that matter at all. You can easilly imagine speakers everywhere: on walls, helmets, thinner ear plugs or even on your shirt. This is possible because very thin carbon nanotube films, with the right frequency of electric currents, can emit sound. It also has a wide frequency response range and high sound pressure. It also turns out that they are practical to build, and are even stretchable. Here is a video with the actual speackers embedded in a flag!

Particles in a confined microscopic space, move in a coordinated manner and can be manipulated and observed with a precision never achieved. A nano-trap can be imagined as a tube the size of a billionth of a meter in which electrons are closed to study their behavior. Thus, scientists from the centers of the Italian Institute for physics of matter of Cnr "S3", Modena and "Nest" of Pisa in collaboration with Columbia University in New York, were able to observe with great precision the behavior of a quartet of electrons confined in one of these structures. Result: the particles move in a coordinated manner and with precise frequencies and can be manipulated. The study was published in Nature Phisics. As it is known, the physics of the matter the size of an atom or less follows different laws than those of classical physics. According to these principles, which fall in quantum physics, the behavior of particles such as electrons can not be described as we are used to (for larger bjects),but it is outlined mainly in terms of probabilistic forecasts. The technique developed by Cnr made it possible to determine the frequency of vibrations of particles through the use of a beam of laser light. The electrons in a nano-trap can only move in a coordinated manner and in accordance with the laws of quantum mechanics, vibrate at frequencies well defined that, thanks to this method, was possible to measure with unprecedented precision.

The rodents, as primates, are able to learn simple abstract principles for later use in different situations... A long considered exclusive to primates appears in reality shared by other species. Having already been demonstrated in some birds in fact, the ability to apply abstract rules just learned, and to to adapt to new situations was also observed in mice. The study, published in a number of Science, was conducted by Robin Murphy of University College London. The experiments were carried out by subjecting the animals to visual and acoustic stimuli. In the first phase mice, divided into three groups, have responded to three different sequences of visual stimuli, consisting of the sequence of light and dark. For each group only a sequence was associated with the food. After an initial period of "training", the mice were able to distinguish between those identifying sequences associated with reward.