Fluids and Viscosity
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Fluids and Viscosity
Liquids and their Properties
Be it the honey on our breakfast toast, the water from the tap or the air surrounding us – they all have one thing in common: in a physical sense they are fluids. That means: if you expose these substances to shear forces, their molecules are shifted against each other and the substance deforms continuously. With honey the shearing force of the knife on the one hand, and the resistance of the rough surface of the bread on the other, lead to this deformation – the honey is easy to spread. Fluids react to even slight force application. The deformation rate increases proportionally to the amount of shear stress. Therefore water flows faster from a plastic bottle when it is compressed more strongly. Physically speaking: the stronger the force, the faster the fluid is deformed. A solid, in contrast, offers a greater resistance to shear forces. Tension is built up inside it until eventually, above a certain threshold, deformation occurs – the stick breaks. But a solid can become a fluid if it changes its state of aggregation and melts. So the ice cube is no fluid, its melt water, however, is. It is easily deformed. It is almost the same with solid and molten steel. Thus temperature plays an important role in the behaviour of fluids.
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Inclusion
Madita is eleven and blind. She does not want to go to a special school but to a regular grammar school. She says she feels "normal" there. Jonathan is eight and has a walking disability. He likes going to the school where he lives. Here, his best friend sits next to him. Max Dimpflmeier, a teacher who is severely deaf, explains that school life is not easy. Quote Max Dimpflmeier: "You don't want to attract attention, you want to avoid saying that it is necessary for you that 70 people adjust to your situation." People on their way to inclusion.
Podcasting
Today, the use of new media has become a matter of course not only in everyday life – schools and teaching, too, benefit from the new technologies and methods, which support active and independent learning. Especially in computer science, ethics and language courses but also in all other subjects, modern media are a valuable pedagogic and didactic asset. This DVD uses the example of podcasts to demonstrate how the possibilities opened up by new media can be applied in the classroom and how the pupils can be taught to handle them in a competent and target-oriented manner. The film is aimed at supporting the use of podcasts at school and encourages making them. This also requires the ability to find information on the Internet and assess it. The film informs on the functionality of podcasts and technical background as well as on the teaching and learning possibilities offered by podcasts – ranging from specific contents to superordinate learning targets such as the advancement of creativity and team spirit. The DVD is a useful support for teachers applying new media and wishing to show their pupils how to handle Running Time: 20:29 ms them in a sensible way.