Play with one or two pendulums and discover how the period of a simple pendulum depends on the length of the string, the mass of the pendulum bob, and the amplitude of the swing. It's easy to measure the period using the photogate timer. You can vary friction and the strength of gravity. Use the pendulum to find the value of g on planet X. Notice the anharmonic behavior at large amplitude.
Blast a Buick out of a cannon! Learn about projectile motion by firing various objects. Set the angle, initial speed, and mass. Add air resistance. Make a game out of this simulation by trying to hit a target.
Can you avoid the boulder field and land safely, just before your fuel runs out, as Neil Armstrong did in 1969? Our version of this classic video game accurately simulates the real motion of the lunar lander with the correct mass, thrust, fuel consumption rate, and lunar gravity. The real lunar lander is very hard to control.
Two Particle Elastic Collision Model
The EJS Elastic Collision Model allows the user to simulate a two-dimensional elastic collision between hard disks. The user can modify the mass, position and velocity of each disk using the sliders. Both disks are draggable and the center of mass is shown a a cross in the simulation.
China is a country in superlative transition. Media attention focuses primarily on the economic miracle and burgeoning political power, while the interwoven and critically important story of mass human migration remains a postscript. Driven from crumbling countryside economics, 200 million Chinese have moved to the cities, serving as cogs in an engine powering unprecedented growth. Though they are changing every facet of Chinese life, these internal migrants are, by law and practice, second-clas
BCLA Open Notebook Science and the Library
This is my April 19, 2007 presentation at the British Columbia Library Association Conference on Open Access. There was only time to do a brief introduction about trends in openness in education and research and how that might affect the needs of scientists in publishing and finding information. I also showed a few screenshots of UsefulChem near the end.
Thanks to Author(s):
Terror and Consent: The Wars for the Twenty-First Century
The threat of terrorism is now part of the landscape of daily lives all over the world, yet we have hardly begun to think properly about it. In his new book Terror and Consent and in this lecture Professor Bobbitt argues that we are fighting these wars with weapons and concepts which though useful to us in previous conflicts have now been superseded. He aims to provide a fundamental rethinking of most generally accepted ideas about terror in the modern world - what it is, how it operates and ab
Living in an era of global terror
In this podcast, Professor Richard Aldrich from the School of Politics and International Relations, discusses the impact of globalisation, the opportunities this affords to global terrorists and the challenges faced by the intelligence services. Globalisation has led to a free flow of money, people and ideas, which has benefited many people in the West in recent years and enhanced our standard of living, but the price paid is a reduction in security. As we see a shift towards a de-regulated glob
Schools Demining Schools
Land mines are silent, secret weapons. They have been placed in over 60 countries around the world. In this web site, you can learn about these dangerous weapons and how you can help make the world safe from land mines.
Welcome the Youth Congress Pilgrims Cabaret and Floor Show announcement
Cultural Activities;International Workers Order; Progressive Club;Flyer promoting floor shows featuring the Evans Family and the I.W.O. Three Keys.
Lecture 20 - 5/13/2009
Evaluating intelligent buildings according to level of service systems integration
The intelligent building is supposed to provide the environment and means for an optimal utilization of the building, according to its designation. This extended function of a building can be achieved only by means of an extensive use of building service systems, such as HVAC; electric power; communication; safety and security; transportation; sanitation, etc. Building intelligence is not related to the sophistication of service systems in a building, but rather to the integration among the vari
Something 's gotta give' architectural animations
Architectural animations are like Harry Langer, a fifty-something entertainment mogul played by best actor nominee Jack Nicholson in the film Something.s Gotta Give. They.ve been surrounded by plenty of pathetic spiritless gimmicks. And, like Harry in the film, they have suffered a heart attack. Harry did not die. Architectural animations are still around, barely. Something.s wrong with them. When Harry begins to recover, he.s surprised to find himself growing fond of a woman his own age (played
Parametric modulations in Masonry
The focus of the research presented in this paper asks how a designer can create a flexible system of physical making which can accommodate multiple programmatic functions within a smooth whole, rather than creating an a priori singular formal object. This adaptable system of construction works through the development of an intelligent CAD model that can be mapped to a flexible manufacturing mechanism, i.e. a reconfigurable mold. This system of manufacturing can be used to cast totally unique
Intuitive and Effective Design of Periodic Symmetric Tiles
This paper presents a new approach for intuitive and effective design of periodic symmetric tiles. We observe that planar graphs can effectively represent symmetric tiles and graph drawing provides an intuitive paradigm for designing symmetric tiles. Moreover, based on our theoretical work to represent hexagonal symmetry by rectangular symmetry, we are able to present all symmetric tiles as graphs embedded on a torus and based on simple modulo operations. This approach enables us to develop a si
Measuring the Impact of Media on Architectural Design (Measuring the Impact of Media on Architectura
The relationship between the media and architectural design can be an important factor and can influence the design outcome. However, the nature, direction and magnitude of this relationship are unknown. Consequently, there have been many speculative claims about this relationship and almost none of them are supported with empirical research studies. In order to investigate these claims and to provide a testable framework, an empirical study has been conducted. A set of quantitative measures was
Abolishing all Nuclear Weapons
Mr Fraser addressed the current state of nuclear weapons acquisition and distribution and the present danger and opportunities facing the world. He covered the failures in disarmament and non-proliferation and the implications and security challenges nuclear weapons have for Australian Defence policy. Mr Fraser will also discuss the current Rudd Government's initiative of the International Commission on Nuclear Non-proliferations and Disarmament, and what Australia can do to help abolish nuclear
Observing climate change effects using the Earth’s gravity field
The Earth's gravity field varies from place to place and from one day to the next. The Gravity Recovery and Climate Experiment (GRACE) is a revolutionary satellite system that allows scientists to use gravity changes to observe critical rates of ice mass loss in Antarctica and Greenland. It can also show changes in the water storage in river drainage basins such as the Murray-Darling Basin. This talk will provide an overview of these results as well as outline NASA's plans for the next such miss
Geological Perspectives on Climate Change
Throughout Earth’s history, mass extinctions of species were closely related to physical and chemical changes in the atmosphere and the oceans. These variations were controlled by heat from the sun, the distribution of oceans and continents, the extent of ice sheets; volcanic eruptions and asteroid impacts, air-borne particles, the eruption of methane and greenhouse effects. Greenhouse episodes were amplified by carbon dioxide and methane feedback effects from warming oceans and drying ve
Origin of the Elements of Life
Human beings are, by nature, curious about their beginnings. Often, such questions of "how we came to be" are confined to the origins of modern society, or the development of human beings as a species. In this lecture, Professor Timothy Beers will endeavour to take the discussion all the way back to the VERY beginning, to the origin of the primary elements required to construct life as we know it -- carbon (C), nitrogen (N), and oxygen (O).Over the past few decades, astronomers and physicists ha