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Unit 10 Environmental Risk Management.m4v
Video commentary on Unit 10.
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{Suresh 685} Present tense related sentences
{Suresh 685} Present tense related sentences वर्त्तमान काल सम्बन्धी वाक्य (Vartmaan kaal sambandhee vaaky) यह फ़ौजी बहुत कड़क है | ( Yah fauzee bahut kadak hai.) This soldier is too […]

Open Classroom - 12/5/12 - #3 Jeff Jacoby
The 2012 Election: Policy Advice to the President Topic for 12/5/12: Immigration
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Introducing Rhodes finalist Giuseppe Del Gobbo
Rhodes Scholarship finalist Giuseppe Del Gobbo talks about why he chose engineering, and why it's important to be a well-rounded student.
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2. Robert Frost
Modern Poetry (ENGL 310) with Langdon Hammer The poetry and life of Robert Frost are characterized in opposition to the works of nineteenth-century poets and Modernists Eliot and Pound. Frost's poetic project, how he positions himself among his contemporaries, his poetics of work, and his concept of "the sound of sense" are discussed. The poems "Mowing" and "'Out, Out--'" are interpreted, and the tensions between vernacular language and poetic form that they showcase are explored. 00:00 - Ch
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10 Years of Creative Commons
5 Years ago TU Delft started publishing educational Resources as OpenCourseWare, under a Creative Commons License. But Creative Commons (providing the license) was around much longer. The coming 10 days (December 7-16) Creative Commons will be celebrating their 10 year Anniversary. That is why Creative Commons will be hosting parties around the world and sharing [...]
Author(s): Martijn Ouwehand

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Rights not set

Anti-Gravity Mirror
In this demonstration, amaze learners by performing simple tricks using mirrors. These tricks take advantage of how a mirror can reflect your right side so it appears to be your left side. To make the effect more dramatic, cover the mirror with a cloth, climb onto the table, straddle the mirror, and then drop the cloth as you appear to "take off." This resource contains information about how this trick was applied during the making of the movie "Star Wars."
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Make a Sun Clock
Before there were clocks, people used shadows to tell time. In this outdoor activity, learners will discover how to tell time using only a compass, a pencil, a handy printout, and a sunny day. Along the way, learners discover the difference between solar and standardized time, and between geographic and magnetic north.
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Mold Terrarium
This activity shows you how to make a mold terrarium using a jar and leftover food. Learners explore mold, an "icky but necessary" thing that helps living matter rot, return to the soil, and provide nutrients for other plants. If you use a variety of food scraps, with preservatives and without, you'll see the different kinds of mold and be able to compare the rate of growth on various foods. Note: don't put meat or fish in your mold terrarium--after a few days, these would start to smell very, v
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Whirling Watcher
In this activity, learners make a stroboscope--a spinning disk with slits around the edge that you look through. Brief but frequent glimpses of images seen through the slits lead to a surprising result, which teaches learners about vision and the human nervous system. The activity includes three short online videos: Introduction, Step-by-Step Instructions, and What's Going On. Also available: a concept map and a "Going Further" document that suggests variations on this activity.
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Kosher Dill Current
This is an activity that demonstrates how batteries work using simple household materials. Learners use a pickle, aluminum foil and a pencil to create an electrical circuit that powers a buzzer. Most common batteries--such as car batteries and the batteries inside a flashlight--work on the same principle that the pickle battery works on: two metals suspended in an ion-rich liquid or paste separate an electric charge, creating an electrical current around a circuit. In this activity, the pickle p
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#224: Radicals in the gallery: Scientists contend with nature's art vandals

Chemistry professor Carl Schiesser and art conservator Caroline Kyi discuss how understanding the effect of free radicals on pigment helps art galleries and museums preserve important works of art. Presented by Dr Shane Huntington.