Posted by bordalix Fri, 22 Dec 2006 18:32:00 GMT
To keep us amused during the holidays, Tom from the New Scientist Technology Blog has compiled a short list of fun materials - stuff that behaves a little bit outside the norm - with instructions to do it at home.
Here goes a short version of the original article:
- Dilatants, also knows as Non-Newtonian fluids, so named because it's properties cannot be described in terms of the concepts of classical fluids. For instance, they get more solid when stressed;
- Auxetic material - materials that get thicker when stretched. Pull them in one direction and they expand in another;
- Superfluids - liquids that flow without friction. They can effortlessly flow through the tiniest of cracks and will even flow up the walls of a beaker and out the top;
- Ferrofluids - magnetic fluids that can look spectacular. They're made from nanoscale magnetic particles suspended in a liquid;
- Dry ice. Carbon dioxide freezes at -78.5 °C and it's fun and versatile stuff: