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.
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Greenland's Receding Ice
After Antarctica, Greenland's ice cap contains the second largest mass of frozen fresh water in the world. Based on new research using NASA's airborne laser altimeter, scientists have identified pronounced thinning of Greenland's ice cap. This new research indicates enough ice loss to cause a measurable ...
Author(s): Michael Starobin

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Prosperity and Thrift: The Coolidge Era and the Consumer Economy, 1921-1929
Prosperity and Thrift: The Coolidge Era and the Consumer Economy, 1921-1929 assembles a wide array of Library of Congress source materials from the 1920s that document the widespread prosperity of the Coolidge years, the nation's transition to a mass consumer economy, and the role of government in this ...
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Calculating Relative Air Mass
The purpose of this activity is to introduce students to the concept of relative air mass and demonstrate how solar elevation angle affects the intensity of sunlight that reaches an observer on the ground. Students work in teams to calculate air mass using simple geometry. Teacher background materials are included.
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003 - Reynolds (Fabulae Faciles)
text available on archive.org as reynolds latin nature reader
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The Impact of mobile learning
Phase one of MoLeNET (2007/08) involved 75 colleges and 18 schools, approximately 10,000 learners and 2,000 staff, in 32mobile learning projects. The Learning and Skills Council provided funding for h...
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22.812J Managing Nuclear Technology (MIT)
An examination of current economic and policy issues in the electric power industry, focusing on nuclear power and its fuel cycle. Introduces techniques for analyzing private and public policy alternatives, including discounted cash flow methods and other techniques in engineering economics. Application to specific problem areas, including nuclear waste management and weapons proliferation. Other topics include deregulation and restructuring in the electric power industry.
Author(s): Lester, Richard

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

Why do black holes have such strong gravity?
This is a live video chat.  The narrator was asked, “Why do black holes have such stronger gravity than the stars they formed from?”  Here's the answer, gravity depends upon two things, the mass of the object and how far away you are from it.  The mass of a star when it collapses the core forms a black hole, so now you can get closer to it and the gravity draws you in.  Video is somewhat confusing - the narrator speaks fast and may be hard
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Call for Papers for OCW Consortium Global Conference 2011

The OpenCourseWare Consortium invites session proposals for its 2011 global conference, Celebrating 10 Years of OpenCourseWare. The OpenCourseWare Consortium is a worldwide community of universities and organizations committed to advancing OpenCourseWare and its impact on global education. The OpenCourseWare movement has grown significantly over the last decade; today there are 13,000 courses published by 150 universities.


We encourage submissions for sessions that highli
Author(s): Willem van Valkenburg

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Harmonic Motion, Part 3 (No Calculus)
Figuring out the period, frequency, and amplitude of the harmonic motion of a mass attached to a spring. This video, which is suitable for high school students, starts with a black screen because the instructor, in his conversational tone, uses it as a 'chalkboard.' Instructor uses different colors for clarification. Run time 09:43.
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Bluefin Tuna Eat Bait Ball
A giant school of mackerel mass together for protection as they are picked off by tuna, sea birds, and dolphins. Watch amazing footage as this happens. This video could be used on a lesson about animal defenses, specifically group defense. Run time 01:51.
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The Interior Nave
Masterpieces of Western Art - Amiens - The Interior Nave - Columbia University > CENTERS & INSTITUTES > Visual Media Center > Art Humanities > Masterpieces of Western Art > Amiens > The Interior Nave
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Indiana Bats of Carter Cave
In this KET video segment from Kentucky Life, explore Bat Cave to find out how endangered Indiana bats are being protected. Learn about the efforts to help the endangered bats from naturalist Sam Plummer who explains why the bats are important and the role humans play in their habitat destruction and protection. Run time 01:48.
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Roman Mass Production
Romans were the first to invent mass production. They figured out how
to use water wheels to create a factory flour mill. Professional video.

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Turning Dunes into Architecture
Architecture student Magnus Larsson details his bold plan to transform the harsh Sahara desert using bacteria and a surprising construction material: the sand itself. Magnus Larsson hopes to build new structures in the desert -- by using bacteria to turn shifting sand into a solid mass. Run time 11:44.
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Gravity Wave Clouds
Lapse of gravity wave action from the Tama, Iowa KCCI-TV webcam on 6 May 2007. A gravity wave is a cloud form created by atmospheric standing waves. These waves are created as stable air flows over a moutain range, and can with er form above or in the lee of the range. As an air mass travels through the wave, it undergoes repeated uplife and descent. If there is enough moisture in the atmosphere, clouds will form at the crests of these waves. No narration.  Run time 0:33.
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JS Bach pt.1
 J.S.Bach occupies a pivotal place in the history of music.His compositions reprensents both the height of the Baropue and the beginning of the Modern Age of music .Filmed in Leipzig,London and America,this documentary both fascinating anf authoritative features specialy-filmed extracts with Jonh Eliot Grandiner conducting the Monteverdi Choir and English Baropue Soloists, performing the Mass in B minor,Andras Schiff playing the GoldBERG variations,Jacques Loussier improvising on the Toccata an
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Korean War Build-Up
The Korean people and landscape were devastated by the extreme cruelty of the Japanese military during World War II. At the conclusion of the war, Japanese forces surrendered to both the U.S. and the Soviet Union in Korea. The surrendered left the USSR in control of the territory north of the 38th parallel and the U.S. in control of the territory to the south of the 38th parallel. Although the U.S. and the Soviet Union proclaimed to seek a unified Korea, both countries retained a sizable militar
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The Chinese Gunpowder
Gunpowder was invented, documented and used in ancient China where the Chinese military forces used gunpowder based weapons technology. This video talks about how gunpowder was discovered and how they used it for firecrackers. (Professional video)Run time 06:17

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A Teacher's Guide to Education Law
J.C. Blokhuis and Jonathan Feldman discuss their new book on education law designed for an audience of educators. Speaker Biography: J.C. Blokhuis is a 2013 Kluge Fellow and assistant professor of social development studies at Renison University College and University of Waterloo. Speaker Biography: Jonathan W. Feldman has been a U.S. Magistrate Judge in the Western District of New York since 1995. For transcript, captions, and more information, visit http://www.loc.gov/today/cyberlc/featu
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