http://nsyght.com/rss/tag/physics Nsyght is a search engine powered by you, your bookmarks, and your friends. en-us 50 Submited by ppmartin 20, November 2008 Thu, 20 Nov 2008 22:43:06 GMT http://www.ageia.com http://www.ageia.com Submited by gahlord 22, November 2008 Sat, 22 Nov 2008 07:49:29 GMT http://ovablastic.blogspot.com/2008/09/sound-waves.html http://ovablastic.blogspot.com/2008/09/sound-waves.html Box2DJS is a JavaScript port of Box2D Physics Engine. To tell the truth, this is converted from Box2DFlashAS3_1.4.3.1 in an automatic manner. (The reason why not Box2DFlashAS3_2.0.0 based is simply because I overlooked the renewal.)<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:46 GMT http://box2d-js.sourceforge.net http://box2d-js.sourceforge.net Fast 2D rigid body physics library in C<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:46 GMT http://code.google.com/p/chipmunk-physics http://code.google.com/p/chipmunk-physics Box2DFlashAS3 is an open source port of Erin Catto's powerful c++ physics library Box2D. Cycle through the demos above to see some of the features.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:46 GMT http://box2dflash.sourceforge.net http://box2dflash.sourceforge.net In the lab you can do hands-on experiments. There are five experiments: * an undamped and undriven pendulum, * a pendulum driven by a sinusoidal force, * a horizontally driven pendulum, * a vertically driven pendulum, * a pendulum with a rotating suspension point. All experiments are realized with Java applets. They should run on any Web browser supporting Java. Sometimes the Java option is switched of. Be sure that it is switch on before running the experiments! Working with the applets should be rather intuitive. Nevertheless, reading the following instructions is recommended.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:45 GMT http://www.nld.ds.mpg.de/applets/pendulum/lab.htm http://www.nld.ds.mpg.de/applets/pendulum/lab.htm Easy Java Simulations, also known as EJS or Ejs, is an authoring tool written in Java that helps non-programmers create interactive simulations in Java, mainly for teaching or learning purposes. EJS has been created by Francisco Esquembre and is part of the Open Source Physics project.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:45 GMT http://www.um.es/fem/EjsWiki http://www.um.es/fem/EjsWiki Relativity can be described using space-time diagrams. Contrary to popular opinion, Einstein did not invent relativity. Galileo preceded him. Aristotle had proposed that moving objects (on the Earth) had a natural tendency to slow down and stop. This is shown in the space-time diagram below.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:44 GMT http://www.astro.ucla.edu/~wright/relatvty.htm http://www.astro.ucla.edu/~wright/relatvty.htm Over the years that Karl's Calculus Tutor has been on line, I have received a number of emails requesting that I show from first principles how you get Einstein's famous formula, E = mc2. I shall begin by assuming that anybody interested enough to read this page is already familiar with basic Newtonian physics and is also familiar with the origin of the time dilation formula, the Lorenz contraction formula, and most importantly, the formula by which the mass of an object increases with its speed. <br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:44 GMT http://www.karlscalculus.org/pdf/einstein.pdf http://www.karlscalculus.org/pdf/einstein.pdf Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:45 GMT http://www.physnet.org/modules/pdfmodules.html http://www.physnet.org/modules/pdfmodules.html Submited by praguebob 20, November 2008 Thu, 20 Nov 2008 22:16:02 GMT http://rvincoletto.multiply.com/journal/item/358 http://rvincoletto.multiply.com/journal/item/358 Submited by praguebob 20, November 2008 Thu, 20 Nov 2008 22:14:52 GMT http://www.kirstensanford.com http://www.kirstensanford.com Submited by praguebob 20, November 2008 Thu, 20 Nov 2008 22:14:01 GMT http://public.web.cern.ch/public http://public.web.cern.ch/public rusting al with mercury<br />Submited by gahlord 22, November 2008 Sat, 22 Nov 2008 07:49:28 GMT http://www.periodictable.com/PopularScience/2004/10/1/index.html http://www.periodictable.com/PopularScience/2004/10/1/index.html Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://www.coolmagnetman.com/magvisual.htm http://www.coolmagnetman.com/magvisual.htm The Biot–Savart Law is an equation in electromagnetism that describes the magnetic field B generated by an electric current. The vector field B depends on the magnitude, direction, length, and proximity of the electric current, and also on a fundamental constant called the magnetic constant. The law is valid in the magnetostatic approximation, and results in a B field consistent with both Ampère's circuital law and Gauss's law for magnetism.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://en.wikipedia.org/wiki/Biot-Savart_Law http://en.wikipedia.org/wiki/Biot-Savart_Law When two magnets are arranged end-to-end with opposite poles adjacent as shown below, the field lines between the magnets go from the north end of the bottom magnet to the south end of the top magnet. Close to the top magnet, field lines emerge from the north end and connect with the south end. The same is true close to the bottom magnet. However, at a distance, the field from the north of the top magnet connects to the south end of the bottom magnet. It is as if there was only one magnet. bar magnet field This type of connection does not occur when two magnets are arranged end-to-end with opposing poles adjacent (in the case shown below two north poles are adjacent). Between the ends the magnetic fields oppose each other and are forced sharply to the side. To the side of each magnet the field lines curve from north to south, however, the field lines are pushed away from the opposing field becoming flatter near the opposing magnet and bulging away on the far side. bar magnet field<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://son.nasa.gov/tass/content/magnetism.htm http://son.nasa.gov/tass/content/magnetism.htm You will find magnetic field pattern for a current flow in a vertical wire. Press "play", the wire will become a circular current loop. When it "paused" again, press "play" again. And it will wound in the form of a helix. (solensolid) You can change the Radius R or change the Z-plane to view field distribution at different Z value. The popup window shows the magnetic flux distribution.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=181.0 http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=181.0 At launch, this online version includes the entire, unedited contents of the 16th edition (published 1995) and is crammed full of tables of data, formulae, graphs and charts. This information span topics from fundamental constants to fibre optics, superconductivity to Raman spectroscopy and many others. The contents will be regularly reviewed and updated to reflect advances and developments in the fields of physics and chemistry.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://www.kayelaby.npl.co.uk http://www.kayelaby.npl.co.uk Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:44 GMT http://micro.magnet.fsu.edu/electromag/java/lenzlaw http://micro.magnet.fsu.edu/electromag/java/lenzlaw We have a string anchored at some point A. At the other end of the string is a small, heavy bob, shown as a black disk in the diagram. This would be an ordinary pendulum, except that the swing is interrupted by a peg at point P.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:44 GMT http://www.av8n.com/physics/loop-de-loop.htm http://www.av8n.com/physics/loop-de-loop.htm Systematic errors are errors that produce a result that differs from the true value by a fixed amount. These errors result from biases introduced by instrumental method, or human factors. An example of an instrumental bias is an incorrectly calibrated pH meter that shows pH values 0.5 units lower than the true value. An example of a method error would be partial loss of a volatile analyte during the ashing step in graphite furnace atomic absorption (AA) spectroscopy. An example of human bias is a student who records titration endpoints beyond the true endpoint due to color blindness. Systematic errors can be identified and corrected by analyzing standards that closely match the real sample.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:44 GMT http://www.chemistry.adelaide.edu.au/external/soc-rel/content/error.htm http://www.chemistry.adelaide.edu.au/external/soc-rel/content/error.htm PortalScience.com offers links to science, biotechnology, physics, astronomy, chemistry, environment, ecology, technology, science resources, social sciences, mechanical engineering, earth sciences, astrophysics, nuclear, molecular.<br />Submited by thang 10, September 2008 Wed, 10 Sep 2008 12:25:21 GMT http://www.portalscience.com http://www.portalscience.com Physics ToolKit, previously named World-in-Motion, is a useful educational tool for lecture, lab, and student assignments. Features include: * Video analysis software with videos covering common topics in mechanics, sound and electromagnetic fields and waves. * Video capture software with support for VFW, WDM and DX capture devices. * Documents, problem sets and demonstration videos covering common topics in the first year of algebra or calculus based physics courses.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://www.physicstoolkit.com http://www.physicstoolkit.com Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://www.physicsforums.com/showthread.php?t=145281 http://www.physicsforums.com/showthread.php?t=145281 formulae for moments of inertia of various objects<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://en.wikipedia.org/wiki/List_of_moments_of_inertia http://en.wikipedia.org/wiki/List_of_moments_of_inertia Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://www.physicsforums.com/showthread.php?t=54081 http://www.physicsforums.com/showthread.php?t=54081 how to prove / derivate moments of inertia for simple objects (e.g. a disc)<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://hypertextbook.com/physics/mechanics/rotational-inertia http://hypertextbook.com/physics/mechanics/rotational-inertia Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://hyperphysics.phy-astr.gsu.edu/hbase/mi.html http://hyperphysics.phy-astr.gsu.edu/hbase/mi.html This process involves a considerable number of physical and mathematical concepts. The angular momentum of the spinning top is given by its moment of inertia times its spin speed but this exercise requires an understanding of it's vector nature. A torque is exerted about an axis through the top's supporting point by the weight of the top acting on its center of mass with a lever arm with respect to that support point. Since torque is equal to the rate of change of angular momentum, this gives a way to relate the torque to the precession process. From the definition of the angle of precession, the rate of change of the precession angle q can be expressed in terms of the rate of change of angular momentum and hence in terms of the torque.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://hyperphysics.phy-astr.gsu.edu/hbase/top.html http://hyperphysics.phy-astr.gsu.edu/hbase/top.html Torque-induced precession (gyroscopic precession) is the phenomenon in which the axis of a spinning object (e.g. a part of a gyroscope) "wobbles" when a torque is applied to it. The phenomenon is commonly seen in a spinning toy top, but all rotating objects can undergo precession.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://en.wikipedia.org/wiki/Precess http://en.wikipedia.org/wiki/Precess The 336-year-old synchronization observations of Christiaan Huygens are reexam- ined in modern experiments. A simple model of synchronization is proposed. Keywords: synchronization, nonlinear dynamics <br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://www.physics.gatech.edu/schatz/pubs/royclocks2.pdf http://www.physics.gatech.edu/schatz/pubs/royclocks2.pdf In 1657, Christiaan Huygens revolutionized the measurement of time by creating the first working pendulum clock. In early 1665, Huygens discovered ``..an odd kind of sympathy perceived by him in these watches [two pendulum clocks] suspended by the side of each other.'' The pendulum clocks swung with exactly the same frequency and 180 degrees out of phase; when the pendulums were disturbed, the antiphase state was restored within a half-hour and persisted indefinitely. Huygens deduced that the crucial interaction for this effect came from ``imperceptible movements'' of the common frame supporting the two clocks. He thought this synchronization could be used to provide the exquisite timing necessary to solve the famous ``longitude problem'' in maritime navigation and spent many years developing and testing designs for pendulum clocks that function at sea.<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://www.physics.gatech.edu/schatz/clocks.html http://www.physics.gatech.edu/schatz/clocks.html A version of Huygens original system provides an elegant classroom demonstration of how systems synchronize. The system consists of two pendulum metronomes resting on a light wooden board which sits on two empty soda cans, see picture above. The metronomes used are Wittner's Super-Mini-Taktell (Series 880), and were chosen because they were inexpensive and had a light base. The base supports were empty beverage containers (Mountain Dew, 12 fl. oz).<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://salt.uaa.alaska.edu/dept/metro.html http://salt.uaa.alaska.edu/dept/metro.html Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://ww2.slcc.edu/schools/hum_sci/physics/tutor/2220/e_flux http://ww2.slcc.edu/schools/hum_sci/physics/tutor/2220/e_flux Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://hyperphysics.phy-astr.gsu.edu/hbase/electric/resis.html http://hyperphysics.phy-astr.gsu.edu/hbase/electric/resis.html There's a phrase that has been bothering me for years: "How do you remove static electricity?" At one level the question makes sense. Everybody involved in electrostatics understands what the inquirer is trying to ask. But at a physics level, as well as a linguistic one, the phrasing is more dubious. A better expression of the question would be "How do you neutralize the field from static charges?"<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://www.ce-mag.com/archive/2000/marapril/mrstatic.html http://www.ce-mag.com/archive/2000/marapril/mrstatic.html Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://hyperphysics.phy-astr.gsu.edu/hbase/hph.html http://hyperphysics.phy-astr.gsu.edu/hbase/hph.html Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://en.wikipedia.org/wiki/Meissner_effect http://en.wikipedia.org/wiki/Meissner_effect Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:43 GMT http://www.phys.unsw.edu.au/~jw/I&Iexperiments.pdf http://www.phys.unsw.edu.au/~jw/I&Iexperiments.pdf Submited by yatot 22, November 2008 Sat, 22 Nov 2008 06:34:39 GMT http://www.aip.org/history/einstein/essay.htm http://www.aip.org/history/einstein/essay.htm Science6.com offers links to science, biotechnology, physics and astronomy, chemistry, environment ,ecology, technology, science resources, social sciences, mechanical engineering, earth sciences, materials, astrophysics, nuclear, software, molecular and much more.<br />Submited by louis23186 30, June 2008 Mon, 30 Jun 2008 13:36:16 GMT http://www.science6.com http://www.science6.com Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:42 GMT http://www.mhhe.com/physsci/astronomy/applets/Blackbody/frame.html http://www.mhhe.com/physsci/astronomy/applets/Blackbody/frame.html Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:42 GMT http://library.thinkquest.org/C006027/html-ver/hist-back.html http://library.thinkquest.org/C006027/html-ver/hist-back.html Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:42 GMT http://www.impactlab.com/2008/06/06/a-whole-new-tiny-world-as-microscope-resolution-doubles http://www.impactlab.com/2008/06/06/a-whole-new-tiny-world-as-microscope-resolution-doubles Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:42 GMT http://www.glenbrook.k12.il.us/gbssci/Phys/Class/light/u12l3c.html http://www.glenbrook.k12.il.us/gbssci/Phys/Class/light/u12l3c.html Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:42 GMT http://www.studyphysics.ca/newnotes/20/unit04_light/chp1719_light/lesson58.htm http://www.studyphysics.ca/newnotes/20/unit04_light/chp1719_light/lesson58.htm Submited by millette 20, November 2008 Thu, 20 Nov 2008 22:00:43 GMT http://www.opensourcephysics.org http://www.opensourcephysics.org Submited by drburix02 20, November 2008 Thu, 20 Nov 2008 19:32:22 GMT http://www.livephysics.com/resources/physics-rss-reader.html http://www.livephysics.com/resources/physics-rss-reader.html Dartmouth Electron Microscope Facility - Dartmouth College - A variety of images from the scanning and transmission electron microscopes<br />Submited by davidar 22, November 2008 Sat, 22 Nov 2008 06:54:41 GMT http://remf.dartmouth.edu/imagesindex.html http://remf.dartmouth.edu/imagesindex.html