1. Stress and Strain Test @ Meritnation

    02:13

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    Do you find Hooke's Law difficult to understand? This video will help you understand 'Hooke's Law' from a simple experiment. A metal wire is stretched at the ends so that its length increases from its natural value. The corresponding stress-strain curve is shown in the graph. When the strain is small, the stress is proportional to the strain. This is the region where Hooke's law is valid. If the strain is increased a little, the stress is not proportional to the strain but the wire is still elastic. The elastic behavior is shown upto a point in the curve called the elastic limit or the yield point. Beyond the elastic limit the behavior of the wire is plastic. If the deformation is increased further, the wire breaks at a certain point known as the fracture point. Watch more education videos at http://www.meritnation.com/products/demo/online

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    • Oxygen is Necessary for Combustion

      01:13

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      Do you think that oxygen is necessary for combustion to take place? If, so then why? In this video, we will try to get the answers to these questions. In order to prove that oxygen is necessary for combustion, we need to perform a small activity. Fix three burning candles on a table and cover them with glass tumblers whose bases have been removed. The first glass tumbler is placed in such a manner that it rests on two blocks of wood. The second tumbler is placed on the table as such while the third tumbler is placed with its base covered with a glass plate. After sometime, one can observe that the candle in the first setup is burning without any disturbance, while the candle in the second set up flickers for a while producing a lot of smoke and then goes out. In the third set up, the flame goes out as soon as the glass plate is placed on the tumbler. This proves that oxygen is necessary for combustion. Watch more education videos at http://www.meritnation.com/products/demo/online

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      • Micelle Formation

        00:48

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        Do you know what micelles are? Well, micelles are small aggregates of particles behaving as colloidal particles. Now, how are these micelles formed? In this video, you will learn about how micelles are formed? When soap is dissolved in water, the soap molecules form micelles. The soap molecule consists of a water-loving, hydrophilic end and a water-hating, hydrophobic end. When interacting with water, the soap molecules align in such a manner that all the hydrophobic ends are towards the centre and away from the water while the hydrophilic ends is towards the periphery. This structure is called a micelle. After viewing this video you will get the clear understanding of the micelle formation. Watch more education videos at http://www.meritnation.com/products/demo/online

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        • Untitled

          00:43

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          • The drilling system of the Ortles Project

            01:48

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            This video shows the main parts of the drilling system used during the ice coring operations carried on the top of the Ortles glacier (Eastern Alps, Italy) made in September 2011

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            • Bio:Fiction Introduction with festival producer Markus Schmidt and festival planner Camillo Meinhart

              07:44

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              Bio:Fiction Introduction with festival producer Markus Schmidt and festival planner Camillo Meinhart

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              • Science_3

                01:36

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                embed on school webpage

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                • Science_2

                  01:57

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                  embed on school website

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                  • Permafrost Degradation: ground thermal and hydrologic responses

                    01:19:20

                    from APECS Webinars / Added

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                    Part 4 of the Arctic System Science Thermokarst Project / APECS Introduction to Changing Permafrost in the Arctic Landscape Online Course. Presenters: --- Sarah Godsey, Idaho State University This webinar series takes an interdisciplinary look at permafrost and thermokarst dynamics in Alaska’s North Slope. It is designed for an audience from a broad range of backgrounds including physical, biological, and social sciences in order to take a holistic look at changes in the terrestrial arctic system. Topics covered include: an overview of permafrost and thermokarst, impacts of thawing permafrost on people, geomorphology, soils and microbes, and arctic vegetation, streams, and lakes. For more information on the course: http://apecs.is/webinars/permafrost-course-2011 For more information on the Arctic System Science Thermokarst Project: http://thermokarst.psu.edu/

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                    • Science_1

                      01:18

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                      Embed to School web page

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