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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Biosecurity: Upgrading the Web of Prevention
In this lecture Professor Dando reviews international control of the biotechnology revolution, the threat of deliberate disease - from biowarfare, bioterrorism, and the possible misuse of benignly intended civil research. He looks at the recent history of the Biological and Toxin Weapons Convention and the emphasis on in-depth implementation of the Convention including codes of conduct and education for life scientists. Professor Dando argues that there is much evidence that life scien
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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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Digitizing Heritage or reconstructing Imagination [Digitalizando la herencia o reconstruyendo la ima
To advance the theme of digital conservation of heritage and tie it to museums, we report on two case studies of digitising archaeological sites; the first is the remains of a typical Scottish Crannog typical of the sixth-century BC., and the second is a UNESCO protected site in the Middle East (the desert castle of Qusayr Amra, Jordan), which dates back to early 8th century. Then we relate both to our investigation into embodiment, interaction and metaphor in virtual environments.
Author(s): Al-Attili, Aghlab; Rosa Mar?a Mendoza Robles

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10.34 Numerical Methods Applied to Chemical Engineering (MIT)
Numerical methods for solving problems arising in heat and mass transfer, fluid mechanics, chemical reaction engineering, and molecular simulation. Topics: numerical linear algebra, solution of nonlinear algebraic equations and ordinary differential equations, solution of partial differential equations (e.g. Navier-Stokes), numerical methods in molecular simulation (dynamics, geometry optimization). All methods are presented within the context of chemical engineering problems. Familiarity with s
Author(s): Green Jr., William

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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

Sustainable Business Forum: the 4th Wave
Andrew Hoffman of the University of Michigan's Erb Institute discusses the implications of an emerging cultural shift to sustainable business, the necessity of "dark greens" and "light greens," the waning meaning of environmental rhetoric, and the difficulties of forming a social consensus around climate change. He believes that conceptions of sustainability are presently based on traditional notions of business strategy and eco-efficiency, defined by existing routines and processes. But the not
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How Three Geos are Rewriting the World Map
Cleo Paskal presents on how geopolitical, geo-economic and geophysical changes are combining to redefine the globe. Part of the World Affairs Great Decisions lecture series, this presentation covers how the reverberating implications of the financial crisis are combining with, and influencing, the political shift towards Asia and massive environmental change (including climate change, demographic shifts, urbanization, and more). This triple whammy of geo-economics, geopolitical and geophysical
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Research Talks: Dr. Tara Shears explains something about Dark Matter- The Biggest Mystery
We are very excited to know more about the exact constitution of our Universe and galaxies. And thats why trying to find out the origin of  Universe. Dr Tara Shears explains why scientists think that most of the mass in the universe is made up of something we can’t see & how a new experiment […]


Author(s): Vishal Seth

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Air - Is It Really There?
By watching and performing several simple experiments, students develop an understanding of the properties of air: it has mass, it takes up space, it can move, it exerts pressure, it can do work.
Author(s): Integrated Teaching and Learning Program,

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Copyright 2011 - Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder,http://www.teachengineering.org/policy_ipp.php

Symmetry Breaking on a Rotating Hoop
The Rotating Hoop Launcher package shows the dynamics of a mass that is constrained to move on a rotating hoop. The rotating hoop model is an excellent mechanical model of first- and second-order phase transitions. Although the minimum of the potential energy curve corresponds to the bottom of the hoop at low rotation frequency, a spontaneous symmetry breaking (cusp catastrophe) occurs as the frequency is increased. This package presents the theory, a demonstration, and an Easy Java Simulation (
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