Yes. And while we are at it, what does it mean when meteorologists say that air is more dense near the surface than higher up, or that cold air is denser than warm?
N Nicholas S. Thompson Emeritus Professor of Psychology and Ethology, Clark University ([email protected]) http://home.earthlink.net/~nickthompson/naturaldesigns/ http://www.cusf.org [City University of Santa Fe] > [Original Message] > From: Marcus G. Daniels <[email protected]> > To: The Friday Morning Applied Complexity Coffee Group <[email protected]> > Date: 11/27/2009 11:21:15 PM > Subject: Re: [FRIAM] Hot Air, and Compressibilty > > [email protected] wrote: > > > > You have to sweep your hand at a speed comparable to that of sound > > (about 330 m/s here on earth) in order stop the air from getting away > > and to achieve any compression. > > > Ok, so in one of the articles mentioned, > > http://physicsworld.com/cws/article/news/40993 > > ..it said.. > > "What they found was that a staggered column of alternately clockwise- > and anticlockwise-rotating turbines significantly enhances the speed of > turbine rotation. The reason, they say, is that the presence of > neighbouring turbines concentrates and accelerates the wind." > > The term `concentrate', to me, sounds like a synonym of `compress' but > in any case `accelerate' could be true in any case. > > The authors of the work are Caltech aerodynamics guys, so if all you'll > give us is, "Shut up and trust the experts", well... > > Is their claim impossible? > > Marcus > > > > > > > > > > ============================================================ > FRIAM Applied Complexity Group listserv > Meets Fridays 9a-11:30 at cafe at St. John's College > lectures, archives, unsubscribe, maps at http://www.friam.org ============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org
