Physics
46500920 / 55500676
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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Curriculum-centred and oriented towards educational standards
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Computer Games
This film covers the topic of computer games in a variety of ways and from many different angles. Apart from the fascina- tion of computer games for users, the historical development as well as the production of computer games are described. The established genres are introduced, the guidelines of the German BPjM are explained. In light of recent public discussions, a neutral overview of the pros and cons of playing computer games is given, and different kinds of player behaviour are outlined. In this film, the pupils will recognise many aspects of their favourite pastime that encourage an independent, constructive use of this medium and reinforce their media competency. The film and teaching material are very closely related to the real-life situation.
Air Traffic
Being able to fly has been a dream of humanity from time immemorial. But it does not even date back a century that people actually started being able to travel through the air. Since the 1960s, the number of flight passengers has been constantly increasing. Thus, the airspace is no longer dominated by birds but by man-made flying objects.
Part Time Kings
Your children are not your children