December, 2007
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December, 2007
Surface Tension photo by by susanad813
originally aired on 20.dec.07 23:15 CET welt-am-draht.de
Surface tension is caused by the attraction between the molecules of the liquid by various intermolecular forces. In the bulk of the liquid each molecule is pulled equally in all directions by neighboring liquid molecules, resulting in a net force of zero. At the surface of the liquid, the molecules are pulled inwards by other molecules deeper inside the liquid and are not attracted as intensely by the molecules in the neighbouring medium (be it vacuum, air or another liquid). Therefore all of the molecules at the surface are subject to an inward force of molecular attraction which can be balanced only by the resistance of the liquid to compression. This inward pull tends to diminish the surface area, and in this respect a liquid surface resembles a stretched elastic membrane. Thus the liquid squeezes itself together until it has the locally lowest surface area possible.
Another way to view it is that a molecule in contact with a neighbor is in a lower state of energy than if it weren’t in contact with a neighbor. The interior molecules all have as many neighbors as they can possibly have. But the boundary molecules have fewer neighbors than interior molecules and are therefore in a higher state of energy. For the liquid to minimize its energy state, it must minimize its number of boundary molecules and must therefore minimize its surface area.
As a result of surface area minimization, a surface will assume the smoothest shape it can (rigorous proof that “smooth” shapes minimize surface area relies on use of the Euler-Lagrange Equation). Since any curvature in the surface shape results in greater area, a higher energy will also result. Consequently the surface will push back against any curvature in much the same way as a ball pushed uphill will push back to minimize its gravitational potential energy. [definition credit - http://en.wikipedia.org/wiki/Surface_tension]
[64MB 192kbps 46mins]
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December, 2007
Burial’s “Untrue” is generating quite a buzz across the broad spectrum of electronic music enthusiasts and for very good reason. When the album dropped on my own ears, I was instantly smitten, my mind smudged, my heart soaked and my emotions smeared. To put it literally, I was floored.
That night I stayed up late taking selections from Untrue and stirring in songs from the first Burial full length to program a playlist for stitching together on the decks with Ms Pinky. The first attempt at recording came out nicely, but upon examining the file, realized… it recorded in mono! Not willing to starve mine or anyone elses ears from the true stereo-sonic beauty of Burial’s incredible output, it was rerecorded and presented here.
I hope you enjoy this lightly blended and respectfully mixed aquaPodcast of Burial material.
[90MB 192kbps 65mins]
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