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# Topic: Pendulum

 Pendulum Physics Simulation The pendulum is modeled as a point mass at the end of a massless rod. This is the equation of motion for the pendulum. The amplitude of the sine relationship is inversely proportional to length of the pendulum. www.myphysicslab.com /pendulum1.html   (967 words)

 Pendulum - Wikipedia, the free encyclopedia The pendulum was discovered by Ibn Yunus during the 10th century, who was the first to study and document its oscillatory motion. A pendulum in which the rod is not vertical but almost horizontal was used in early seismometers for measuring earth tremors. Pendulums (these may be a crystal suspended on a chain, or a metal weight) can also be used in divination and dowsing. en.wikipedia.org /wiki/Pendulum   (564 words)

 pendulum. The Columbia Encyclopedia, Sixth Edition. 2001-05 The length of a pendulum is the distance from the point of suspension to the center of gravity of the bob (see center of mass). Metal pendulums are lengthened by heat; to counteract the effect of temperature changes, compensation pendulums have been devised, many of them operating by the opposite expansion of different metals in compound rods. In 1851, J. Foucault demonstrated the rotation of the earth by suspending in the Panthéon in Paris a 200-ft (61-m) pendulum that traced its path in sand on the floor. www.bartleby.com /65/pe/pendulum.html   (454 words)

 The Galileo Project | Science | Pendulum Clock His first biographer, Vincenzo Viviani, states that he began his study of pendulums after he watched a suspended lamp swing back and forth in the cathedral of Pisa when he was still a student there. Galileo's discovery was that the period of swing of a pendulum is independent of its amplitude--the arc of the swing--the isochronism of the pendulum. In 1602 he explained the isochronism of long pendulums in a letter to a friend, and a year later another friend, Santorio Santorio, a physician in Venice, began using a short pendulum, which he called "pulsilogium," to measure the pulse of his patients. galileo.rice.edu /sci/instruments/pendulum.html   (956 words)

 Chaotic Pendulum Physics Simulation A damped driven pendulum is often used as a basic example of a chaotic system. The damping (friction) is proportional to the angular velocity of the pendulum. This is the equation of motion for the driven damped pendulum. www.myphysicslab.com /pendulum2.html   (620 words)

 Pendulum The classic pendulum story has the young Galileo Galilei (1564-1642) using his heart rate to time the oscillations of the chandelier in the cathedral at Pisa. The period of the pendulum depends on its length, but the length of a metal pendulum rod changes with the temperature; as the temperature goes up, the length increases and the clock controlled by the pendulum runs slow. The basic device was the "seconds pendulum with audible beat, with dial and projecting pointer, on iron stand with levelling screws". physics.kenyon.edu /EarlyApparatus/Mechanics/Pendulum/Pendulum.html   (961 words)

 Pendulum - Succeed in Physical Science Pendulums have been used in clocks for hundreds of years, because the motion is so regular. The frequency of the pendulum is dependent on the length (L) of the string or wire. The Foucault Pendulum - University of Louisville pendulum www.school-for-champions.com /science/pendulum.htm   (1416 words)

 Smithsonian FAQs: Foucault Pendulum Thus if you stood watching the pendulum, after a quarter of an hour or so, you would be likely to notice that the line of the pendulum's swing has changed to a different direction. For a pendulum to easily demonstrate the Foucault effect, it should have as long a cable as possible (this one is 52 feet) and a heavy symmetrical bob (this one is hollow brass, weighing about 240 pounds). When the pendulum cable reaches a particular point in its swing, it is detected by an electronic device and the magnet is turned on at just the right time to give the collar (and thus the cable and the bob) a little "kick" in the exact direction of its natural swing. www.si.edu /resource/faq/nmah/pendulum.htm   (1046 words)

 Pendulum   (Site not responding. Last check: 2007-09-10) Consider a pendulum hanging on a string from a hook on a wall. The pendulum's string is affixed at the origin (0,0). The pendulum's string is made of some futuristic material that only bends where it touches a hook but is otherwise rigid. acm.uva.es /p/v3/319.html   (461 words)

 Foucault pendulum - Wikipedia, the free encyclopedia At the equator the equilibrium position of the pendulum is in a direction that is perpendicular to the Earth's axis of rotation. The origin of the force that is involved in the precession of the Foucault pendulum with respect to the fixed stars is the centripetal force that keeps objects on the Earth's surface moving in circular paths. It is common to describe the precession of the pendulum as being 'due to the coriolis effect'. en.wikipedia.org /wiki/Foucault_pendulum   (2853 words)

 The Physics Classroom The motion of a pendulum is a classic example of mechanical energy conservation. A pendulum consists of a mass (known as a bob) attached by a string to a pivot point. At all points in the trajectory of the pendulum bob, the angle between the force of tension and its instantaneous displacement is 90 degrees. www.physicsclassroom.com /mmedia/energy/pe.html   (370 words)

 Pendulum -- from Eric Weisstein's World of Physics A "bob" or "simple" pendulum is a pendulum consisting of a single spherical (or point) mass attached to a wire of negligible weight. A "physical" pendulum has extended size and is a generalization of the bob pendulum. A simple pendulum can be treated as a special case of a physical pendulum with moment of inertia scienceworld.wolfram.com /physics/Pendulum.html   (352 words)

 Amusement Park Physics -- Pendulum Pendulum rides are a little like the swing sets you might remember from your childhood. Yet at the top of a pendulum ride, the same 180-pound person will feel less than this normal sensation of weight. At the very top of the pendulum ride, riders begin to fall out of their seats. www.learner.org /exhibits/parkphysics/pendulum.html   (457 words)

 Pendulum A simple pendulum is one which can be considered to be a point mass suspended from a string or rod of negligible mass. This expression for period is reasonably accurate for angles of a few degrees, but the treatment of the large amplitude pendulum is much more complex. The frequency of the pendulum in Hz is given by hyperphysics.phy-astr.gsu.edu /hbase/pend.html   (269 words)

 Pendulum The International Pendulum Project (IPP) is a research project - funded by the Australian Research Council (ARC) - on liberal, contextual and cross-disciplinary approaches to the teaching and learning of pendulum motion at primary, secondary and tertiary levels. The International Pendulum Project is ideally suited to benefit from this scheme, and an application for Linkage Funds is being considered, hopefully involving a number of overseas research centres. Pendulum Fellowships: Funds have become available for a number of modest pendulum fellowships tenable at UNSW. www.arts.unsw.edu.au /pendulum   (303 words)

 No Title We have chosen to study the behavior of a pendulum and try to learn how the length of the pendulum arm and the size and mass of the pendulum bob affect its motion. This algorithm approximates the velocity and angular displacement of the bob of a pendulum using a time stepping scheme to first update the velocity and then use the updated velocity to update the displacement using Equations (1) and (2) of the previous section. As a partial validation of the code, we plan to use a one meter long pendulum and a stop watch to see if a pendulum released from 45 degrees takes about.5 seconds to reach the vertical (.5 seconds is what the code predicts). cauchy.math.colostate.edu /Summer99/pendulum   (2051 words)

 The Lab In the center there is the animation area where the motion of the pendulum is shown. In addition, the position of the pendulum is also changed according to the mouse pointer. Note, that sometimes the pendulum may be in a dynamical state which never fulfills the trigger condition. monet.physik.unibas.ch /~elmer/pendulum/lab.htm   (605 words)

 Pendulum Pendulum was shot in numerous locations throughout the metroplex including Dallas City Hall, Tarrant County Courthouse, Chandler's Landing Marina in Rockwall, Scottish Rite Cathedral, The Old Warsaw restaurant, Main Street Internet Cafe and Gypsy Tea Room. The giant pendulum which Showcase built behind the concierge desk in the Carlton Hotel caused an incredible BUZZ among the buyers, and led to sales with such distributors and territories as Videoville Showtime, Inc. for French Canada, TOT Media for Spain, Gussi for Mexico, Mediafilm Network s.r.l. "PENDULUM" is a gripping story of power, betrayal and murder involving the "old boy network" which holds the political power in one of America's biggest cities where a renowned law professor's murder is linked to the killings of several women, revealing the city's darkest secrets. www.pendulumfilm.com /pressreleases.html   (1357 words)

 RealMagick Article: Pendulum Divination by Muadhnait The Pendulum is a divination tool made of a piece of string and a weight. The two most common pendulum models involve either the suspension of a ring from a thin silk thread, or the suspension of a crystal from a chain. At first, I made my own pendulum using a chain and a ring, but then I bought this silver chain with a beautiful, pure crystal, and I must say it is much more accurate. realmagick.com /articles/57/2057.html   (966 words)

 Pendulums on the Moon Activity - DiscoverySchool.com   (Site not responding. Last check: 2007-09-10) Distribute copies of the Pendulums on the Moon worksheet; then explain to your students that they will need to conduct experiments to determine whether each of the four variables has an effect on the rate of a pendulum’s swing. When the discussion is complete, distribute copies of the Pendulums on the Moon worksheet answers and discuss the various variables with the class. Your students are now ready to begin phase 1 of their experiments, in which they will use the pendulum apparatus you have provided to test the effects of length, starting angle, and mass on the pendulum’s rate of swing. school.discovery.com /lessonplans/activities/pendulums   (1091 words)

 Mathematical mysteries: Foucault's pendulum and the eclipse A Foucault pendulum is just like any other pendulum, nothing more than a weight attached to a wire; but to work well it needs to have a very long wire, with a really heavy weight. What makes a Foucault pendulum different from a normal pendulum is that it is attached at the top to a universal joint which allows the pendulum to rotate freely around its fixing point as it swings. The rate of rotation of Foucault's pendulum is pretty constant at any particular location, but in 1954, during an experiment with one, a physicist named Maurice Allais got a surprise. plus.maths.org /issue9/xfile   (780 words)

 The Simple Pendulum If a pendulum of mass m attached to a string of length L is displaced by an angle Since the restoring force is proportional to the displacement, the pendulum is a simple harmonic oscillator with ``spring constant'' k = mg/L. In this small angle approximation, the amplitude of the pendulum has no effect on the period. theory.uwinnipeg.ca /physics/shm/node5.html   (134 words)

 Inexpensive Pendulums - Clear Acrylic Pendulum On-line Store (via CobWeb/3.1 planetlab1.netlab.uky.edu)   (Site not responding. Last check: 2007-09-10) Pendulum dowsing is using the pendulum to locate or find things or answers. Pendulum dowsing can be used to find lost items, determine if food or water is healthy to eat or drink, if a relationship is right... In forensics, police investigators use the pendulum to enhance the memory of witnesses. www.pendulumwarehouse.com.cob-web.org:8888   (517 words)

 www.myspace.com/officialpendulum (via CobWeb/3.1 planetlab1.netlab.uky.edu)   (Site not responding. Last check: 2007-09-10) Pendulum formed in their home-town of Perth (Western Australia) in 2002, when producers Rob Swire and Gareth McGrillen teamed up with acclaimed local DJ Paul 'Elhornet' Harding. While their individual formative roots ranged from producing drum & bass, breakbeat and hardcore, to playing in metal and punk bands, their comparable talents proved an unstoppable force when they managed to single-handedly conquer the world of drum & bass in their first 12 months together. The last 12 months have seen Pendulum retreat to the depths of the underground to work on their second album, and to hone and perfect their sound for the live arena. www.planetpendulum.com.cob-web.org:8888   (1207 words)

 Pendulum   (Site not responding. Last check: 2007-09-10) This Java applet demonstrates the variation of elongation, velocity, tangential acceleration, force and energy during the oscillation of a pendulum (assumed with no friction). The "Reset" button brings the body of pendulum to its initial position. The length of the pendulum, its mass and the amplitude of the oscillation can be changed within certain limits. www.physics.uoguelph.ca /Fendt_app/phe/pendulum.htm   (118 words)

 Pendulum Instruments - experts in time & frequency calibration, measurement and analysis   (Site not responding. Last check: 2007-09-10) Pendulum Instruments is a Swedish innovation company focused on solutions for calibration, measurement and analysis of time and frequency as well as related parameters. The company is one of the world's leading suppliers of frequency counters, and experts in time & frequency calibration, measurement and analysis. Pendulum is a spin-off company from Philips test & measurement division, with over 40 years experience in the test and measurement business. www.pendulum.se   (189 words)

 Pendulum Resources: Support Pendulum email list has been together for well over ten years. Probably the first email list for bipolars, Pendulum Email List is by consumers, for consumers. The information at this web site is for consumers, family members and mental health workers to make informed decisions about the care and treatment of bipolar disorder, AKA manic depression. www.pendulum.org /support/support.html   (79 words)

 Pendulum (band) - Wikipedia, the free encyclopedia (via CobWeb/3.1 planetlab1.netlab.uky.edu)   (Site not responding. Last check: 2007-09-10) Pendulum is a drum and bass/breaks group from Perth, Australia. Pendulum have also collaborated with The Freestylers, releasing the single Fasten Your Seatbelt. Their first performance was at the Fabric nightclub in London on October the 6/7th accompanied by MC Verse. en.wikipedia.org.cob-web.org:8888 /wiki/Pendulum_(band)   (316 words)

 Pendulumâ„¢ font family : MyFonts   (Site not responding. Last check: 2007-09-10) Pendulumâ„¢ is a Canada Type font family with 2 styles priced from \$19.95. Pendulum is the much-anticipated digitization and swashy expansion of Americana, an amazing yet long overlooked treasure from the Nebiolo foundry, circa 1945. To complement the beauty of the original letters, Pendulum comes with two additional sets of swashed ending lowercase we call Swings. www.myfonts.com /fonts/canadatype/pendulum   (280 words)

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