Motion Mountain - The Free Physics Textbook for Download Simple mechanisms explained Email Below you’ll find animated diagrams and explanations of how various mechanisms work. Some of these have been crucial to major evolutions in mechanisms and technology, and allow us to do anything from fire weaponry to make cars move with the press of a pedal. Maltese Cross mechanism powers second hand movement in the clock: Radial engines are used in aircraft. Today, however, most aircraft use turbine engines: Reciprocating movements power steam engines in locomotives: Sewing machine: Manual transmission mechanism, also known as “stick shift” is used to change gears in vehicles: This mechanism is called constant-velocity joint and is used in front-wheel drive vehicles: Torpedo-boat destroyer system is used to destroy fleet in naval military operations: The Wankel engine is a type of internal combustion engine which uses a rotary design to convert pressure into a rotating motion instead of using reciprocating pistons: + Bonus – mechanism you can watch forever Leave your comment:
Change the World. Yourself ‘The last free people on the planet’ <div class="greet_block wpgb_cornered"><div class="greet_text"><div class="greet_image"><a href=" rel="nofollow"><img src=" alt="WP Greet Box icon"/></a></div>Hello there! If you are new here, you might want to <a href=" rel="nofollow"><strong>subscribe to the RSS feed</strong></a> for updates on this topic.<div style="clear:both"></div></div></div> In small pockets around the world live isolated indigenous communities, groups that, even though they have had run-ins with their neighbours or Westerners, prefer to avoid or resist any further contact. Survival International reports that about one hundred groups around the world prefer to be left alone. The BBC is the gift that seems to keep on giving to Neuroanthropology this week. The footage shows people who refuse to come in from the forests.
Teleportation Teleportation is the name given by science fiction writers to the feat of making an object or person disintegrate in one place while a perfect replica appears somewhere else. How this is accomplished is usually not explained in detail, but the general idea seems to be that the original object is scanned in such a way as to extract all the information from it, then this information is transmitted to the receiving location and used to construct the replica, not necessarily from the actual material of the original, but perhaps from atoms of the same kinds, arranged in exactly the same pattern as the original. A teleportation machine would be like a fax machine, except that it would work on 3-dimensional objects as well as documents, it would produce an exact copy rather than an approximate facsimile, and it would destroy the original in the process of scanning it. In 1993 an international group of six scientists, including IBM Fellow Charles H. C.H. Experimental Articles D.
Gates Puts Feynman Lectures Online MicrosoftThe new Tuva Web site features annotated videos of Richard Feynman’s physics lectures. Microsoft Chairman Bill Gates believes that if he had been able to watch physicist Richard Feynman lecture on physics in 1964 his life might have played out differently. Mr. Gates, of course, is legendary as a Harvard University dropout who went on to create the world’s most successful software firm. He has told associates that if had watched the lectures earlier in his life he might have become a physicist instead of a software entrepreneur. However, Mr. Microsoft Research announced on Wednesday that Mr. The name “Tuva” was chosen in reference to Dr. Mr. “I do think that making science cool to people when they’re young and therefore getting more people to go into it in an in-depth way, I think that’s very important right now,” Mr. The Tuva Web site will be expanded with additional Feynman lectures in the future, Mr. Mr. “I couldn’t help myself, I watched them one more time,” he said.
The eyes of a creature Forget about BeetleCam and other devices. A British photographer risked his life as he captured these wildlife shots. Jonathan Griffiths held his camera just inches away from tigers, bears and cougars as he took the pictures. The 32-year-old endured minus 40 degree Celsius temperatures at a Canadian wildlife breeding reserve as he gained the trust of each animal over two or three days. He enticed them with meat – mainly chicken – to photograph them close-up in his 15-month project. ..and in another shot a tiger left condensation on his lens with its breath. The currency trader flew to Canada, where he stayed in a lodge by a wildlife breeding reserve. Jonathan said: “At first I was quite nervous being so close to the animals as I did not know what to expect and they are wild… (Jonathan Griffiths/Solent) For Jonathan the scariest moment came when he came face-to-face with a black leopard, “which made me fear for my life and I thought it could attack at any moment. More photos!
25 Awe-Inspiring Science Talks on TED The natural world is an amazing thing, and despite the volumes upon volumes that we know about it, we’ve barely scratched the surface when it comes to truly understanding our universe and the things within it. Yet just because there’s so much information out there doesn’t mean you shouldn’t try to learn as much as you can about science. These lectures reflect information that’s at the cutting edge, from medical discoveries that could change lives to astrophysical research that’s expanding our knowledge of the worlds that lie beyond our own galaxy, and they can help you get an education in some of the greatest wonders the scientific fields have to offer. Humans These lectures address the science of human life, from how our brains work to how we interact with one another. Technology The latest technology and the speed with which it is evolving is nearly always awe-inspiring. Space Nature Health and Medicine
David Griffiths Emeritus Professor of Physics Knowlton Laboratory of Physics 26 (503) 777-7252 email: griffith@reed.edu Education: Ph. D. Physics 1970 Harvard University M. Dissertation: "Covariant Approach to Massless Field Theory in the Radiation Gauge" (advisor: Sidney Coleman) Post-Doctoral positions: 1970-72 University of Utah1972-74 University of Massachusetts, Amherst Employment: 1974 Hampshire College, Amherst, MA1974-77 Mt. Research interests: Classical Electrodynamics Quantum Mechanics Elementary Particle Theory Selected recent student thesis titles: 2009, Robin Bjorkquist, "Hidden Momentum"2008, Jacob Gilman, "A Study of the B+ Meson Decay to ω ρ+"2006, Kevin Connolly, "Quantum Mechanics of the Electric Dipole Potential" 2005, Darren Platt, "Self-Adjoint Extensions and Quantum Mechanics" 2004, Moira Gresham, "Two-Dimensional Radial Laplacian Growth" Selected recent publications: "Quantum Mechanics of the 1/x^2 Potential" (with Andrew Essin), Am. Books: "Introduction to Electrodynamics, 3rd ed Script r: