Science News: Nanoguitar Photo by D. Carr and H. Craighead, Cornell. The world's smallest guitar is 10 micrometers long -- about the size of a single cell -- with six strings each about 50 nanometers, or 100 atoms, wide. Made by Cornell University researchers from crystalline silicon, it demonstrates a new technology for a new generation of electromechanical devices. The world's smallest guitar -- carved out of crystalline silicon and no larger than a single cell -- has been made at Cornell University to demonstrate a new technology that could have a variety of uses in fiber optics, displays, sensors and electronics. The "nanoguitar" -- made for fun to illustrate the technology -- is just one of several structures that Cornell researchers believe are the world's smallest silicon mechanical devices. "We have a new technology for building the smallest mechanical devices," said Harold G. The guitar has six strings, each string about 50 nanometers wide, the width of about 100 atoms. Photo by D. Photo by D.
Map Tunnelling Tool Tunnel to the Other Side of the Earth Have you ever wondered which part of the other side of the earth is directly below you? Find out using this map tunnelling tool. Map Tunnelling Tool Options Unlink Zoom between Map 1 and Map 2 How to use the Map Tunnelling Tool Drag map 1 or 2 by clicking and holding the map as you move it. To make things easier, you can also zoom the map in and out. You can adjust the height of the map by using the small, medium and large buttons. You can also change the map view using the Map, Satellite and Hybrid buttons. About This is a Antipodes Map. Version History 9th March 2014 - Update to fix bug with crosshairs not appearing on the exact centre of the map 11th November 2013 - Implemented Google Maps API V3 21st September 2009 - Removed border around maps for better fit 14th January 2009 - Added Unlink Zoom option 22nd October 2008 - Added dual control so both maps can be the "driver" and the "passenger". Future Developments Relevant Links Google Earth Tunnelling Tool
stereomood – emotional internet radio - music for my mood and activities The Science Creative Quarterly & A DIALOGUE WITH SARAH, AGED 3: IN WHICH IT IS SHOWN THAT IF YOUR DAD IS A CHEMISTRY PROFESSOR, ASKING “WHY” CAN BE DANGEROUS - StumbleUpon SARAH: Daddy, were you in the shower? DAD: Yes, I was in the shower. SARAH: Why? DAD: I was dirty. DAD: Why does the shower get me clean? SARAH: Yes. DAD: Because the water washes the dirt away when I use soap. DAD: Why do I use soap? DAD: Because the soap grabs the dirt and lets the water wash it off. DAD: Why does the soap grab the dirt? DAD: Because soap is a surfactant. DAD: Why is soap a surfactant? DAD: That is an EXCELLENT question. DAD: Why does soap form micelles? DAD: Soap molecules are long chains with a polar, hydrophilic head and a non-polar, hydrophobic tail. SARAH: Aidrofawwic DAD: And can you say ‘hydrophobic’? DAD: Excellent! DAD: Why does it mean that? DAD: It’s Greek! SARAH: Like a monster? DAD: You mean, like being afraid of a monster? DAD: A scary monster, sure. (pause) SARAH: (rolls her eyes) I thought we were talking about soap. DAD: We are talking about soap. (longish pause) DAD: Why do the molecules have a hydrophilic head and a hydrophobic tail? DAD: That’s complicated.
The Most Popular Tourist Attraction in Croatia Photograph by Jack Brauer All of the Croatian people I have met through my years have always talked about the natural beauty of their homeland. I always nodded in agreement because it struck me that most people shared the same sentiment, regardless of their origin. This says to me, that natural beauty and splendor are everywhere. Our planet is a wonderful place and there are countless gems like the Plitvice Lakes National Park in Croatia, for us to appreciate and preserve. The Plitvice Lakes National Park was granted UNESCO World Heritage status in 1979. Photograph by Roman Bonnefoy The National Park covers a total area of 300 square kilometers (116 sq. miles), whilst the lakes join together over a distance of eight kilometers (5 miles). The lakes are renowned for their distinctive colours, ranging from azure to green, grey or blue. Photograph by Henning Schroder The Plitvice Lakes had become a major tourist attraction in the late 19th century. Source: Wikipedia Photograph by Roybb95
Simple animation to explain complex principles - Electronics 1, aircraft radial engine 2, oval Regulation 3, sewing machines 4, Malta Cross movement - second hand movement used to control the clock 5, auto change file mechanism 6, auto constant velocity universal joint 6.gif 7, gun ammunition loading system 8 rotary engine - an internal combustion engine, the heat rather than the piston movement into rotary movement # Via World Of Technology. 1, inline engine - it's cylinders lined up side by side 2, V-type engine - cylinder arranged at an angle of two plane 3, boxer engine - cylinder engine arranged in two planes relative World Sunlight Map Watch the sun rise and set all over the world on this real-time, computer-generated illustration of the earth's patterns of sunlight and darkness. The clouds are updated daily with current weather satellite imagery. The Mercator projection used here is one way of looking at the spherical earth as a flat map. Used since the 16th century for navigation, straight lines on this map can be used accurately as compass bearings but the size and shape of continents are distorted. Compare this with Peters, Mollweide or equirectangular projection maps. Also available is a semi-realistic view of dawn and dusk from far above the Earth, a look at the moon, and information about how this works.
Lots of Jokes - Did You Know? - StumbleUpon Q. Why do men's clothes have buttons on the right while women's clothes have buttons on the left? A. When buttons were invented, they were very expensive and worn primarily by the rich. Since most people are right-handed, it is easier to push buttons on the right through holes on the left. Because wealthy women were dressed by maids, dressmakers put the buttons on the maid's right! Q. A. Q. A. Q. A. Q. A. Q. A. Q. A. Q. A. Q. A. Mary liked this a lot and when returned to Scotland (not a very good idea in the long run), she took the practice with her. Q. A. Q. A.
Math, Physics, and Engineering Applets Oscillations and Waves Acoustics Signal Processing Electricity and Magnetism: Statics Electrodynamics Quantum Mechanics Linear Algebra Vector Calculus Thermodynamics Mechanics Miscellaneous Licensing info. Links to other educational sites with math/physics-related information or java applets useful for teaching: And when you get tired of learning, here is some fun stuff: Pong Simulation Circuit-level simulation of original 1972 Pong.