tag:techtv.mit.edu,:Array/217748000 2008-01-27 18:36:11 -0500 chosetec Arts and Crafts at MIT presents: <p>How to make a sword. <br /> with Brian Chan </p><p>In an upcoming video I will show you how to create a sword from scratch. Take your scrap steel and make something useful. We will go over the basics of forging, filing, heat treatment and polishing. We'll also touch on the fabrication of metal and wooden fittings to complete your sword. </p><p>Written and directed by Brian Chan <br />All swords shown forged by Brian Chan <br />Music by Seth Friedman </p> 55 tag:techtv.mit.edu,:Array/219665420 2008-06-26 16:47:33 -0400 MIT Department of Physics Technical Services Group <p>A long length of wire is suspended horizontally between the poles of a magnetron magnet. When a large current from a 12V storage battery is passed through the wire, the wire jumps out of the magnetic field. When the direction of the current is switched, the wire jumps the opposite direction.</p><p>The magnetron magnet in this demonstration was originally used in MIT's groundbreaking research developing radar during and after World War II. Microwave emitting <a href="http://en.wikipedia.org/wiki/Cavity_magnetron">cavity magnetrons</a> need strong magnetic fields, which were often created by powerful permanent magnets like the one used in this demo. </p> 37 tag:techtv.mit.edu,:Array/219566800 2009-08-17 10:44:10 -0400 endlab The internal wave field generated by a knife edge, as viewed using Synthetic Schlieren. 8