Making my way to linkedin. Hopefully this will hit the mark. We shall see.
Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time. In dry air at 20 °C (68 °F), the speed of sound is 343 meters per second (1,125 ft/s). This equates to 1,236 kilometers per hour (768 mph) or about one mile in five seconds. This figure for air (or any given gas) increases with gas temperature (equations are given below), but is nearly independent of pressure or density for a given gas. For different gases, the speed of sound is dependent on the mean molecular weight of the gas, and to a lesser extent upon the ways in which the molecules of the gas can store heat energy from compression (since sound in gases is a type of compression).
Although “the speed of sound” is commonly used to refer specifically to the speed of sound waves in air, the speed of sound can be measured in virtually any substance. Sound travels faster in liquids and non-porous solids than it does in air, traveling about 4.4 times faster in water than air.
Additionally, in solids, there occurs the possibility of two different types of sound waves: one type is associated with compression (the same as usual sound waves in fluids) and the other is associated with shear-stresses, which cannot occur in fluids. These two types of waves have different speeds, and (for example in an earthquake) may thus be initiated at the same time but arrive at distant points at appreciably different times. The speed of compression-type waves in all media is set by the medium’s compressibility and density, and the speed of shear-waves in solids is set by the material’s rigidity and density.
Finally, there are certain other types of very unusual waves of compression that occur only in very unusual media, such as the so-called “second sound” (an unusual heat transmission) which occurs only in superfluid liquid helium. [1]
[1] Wikipedia – Speed of Sound (click here to view original reference)
Am I the only one that has made these associations?
This is a test from my iPhone to see how well this application works
Melissa Ferreira lives in Providence, Rhode Island where she does her fine art and illustration projects in addition to teaching. This combination has led her to travel to France, as an instructor at the Pont-Aven School of Contemporary Art in Brittany, and to Hiva Oa in the Marquesas Islands, where she was an artist-in-residence. She has exhibited in both locales as well as in Rennes (France), Kirkcudbright (Scotland), Providence, Boston and New York. At the Society of Illustrators’ Dreams show, she was awarded first place for her entry to RSVP’s national competition in 2003. An adjunct faculty in RISD’s Illustration Department, Ferreira also accepts private commissions and takes assignments for clients whose needs range from children’s books to concept art to editorial illustration. She has shared a studio with her husband Jon Foster, and their beloved pets, ever since graduating from RISD in 1990.
Welcome to NationMaster, a massive central data source and a handy way to graphically compare nations. NationMaster is a vast compilation of data from such sources as the CIA World Factbook, UN, and OECD. Using the form above, you can generate maps and graphs on all kinds of statistics with ease.
Pew Internet & American Life Project
The Pew Internet & American Life Project produces reports that explore the impact of the Internet on families, communities, work and home, daily life, education, health care, and civic and political life. The Project aims to be an authoritative source on the evolution of the Internet through collection of data and analysis of real-world developments as they affect the virtual world.
Internet Research Group : Services
Founded in 1997, Internet Research Group provides custom research and consulting with a special focus on evaluating how new and emerging media can enhance a company\’s general business. Since then, we’ve helped many leading companies develop practical strategies for new products, websites, and media and some of our studies have changed the way our clients think about and manage their business.
Wow. Daniel Adel\’s work is truly amazing. It is absurd how talented he is.
Visit his website here
Below is a wonderful sample of Daniel’s work
What\’s Pando? | Welcome to Pando
What\’s Pando?
Pando is free software that lets you send and receive files and folders of any size* with your existing email address.
Pando is free P2P software that makes downloading, streaming and sharing large media files fast, easy and fun. Need to email large attachments, IM a folder, or publish your downloadable videos to the Web? Maybe you’d just like to watch full-screen HD Internet TV. Meet Pando.
Personal Kyoto: Achieve Your Own Personal Kyoto Protocol!
Track your residential or commercial electric usage automatically and achieve your own Personal Kyoto.
Personal Kyoto provides New Yorkers the means to measure, track and share their progress towards meaningful electric use reduction.
frequency decoder | Unobtrusive Table Sort Script (revisited)
I’m currently in the process of rewriting a web-application that displays lots of tabular data. The previous application enabled users to sort the table rows by clicking on the table header text but unfortunately, passed the processing overhead back to the server, meaning the entire page was reloaded on each click… nasty.
The original applications table rows were “zebra striped” (again, this was originally handled by the server code), which means that a JavaScript solution has to also keep the order of the stripes after sorting & rearranging the table rows.
Crazy Egg – visualize your visitors
* Test different versions of a page to see which works better
* Discover which ad placement gives the best results
* Find out which design encourages visitors to click deeper
* Learn which content leads to improved sales
About MacLibre | MacLibre
MacLibre, a rigorous selection of free, legal software for Mac OS X
MacLibre is an Open Source Software Distribution for Mac OS X developed during the Google Summer of Code program mentored by the WinLibre project.
Twitter Tracker (Conan Style)