I am a big fan of stumbleupon as it gives you a nice view of all the interesting things on the internet, most of the time it’s mediocre websites and jokes etc, but occasionally I come across something really interesting… like this gif:
In this image we can see a metal ‘slug‘ surrounded by a metal copper coil connected to an AC current. This means the coil is acting as an electromagnetic – which accounts for the fact the slug is ‘floating’. This is explained by eddy currents which form in the slug. Some of the electrical resistance from this is converted into heat – and it builds up in the slug causing it to heat up and melt!
Just one example of how cool chemistry and physics can be!
Some of the best things you can ever find are on the internet, you just need to go…
View original post 12 more words