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Steam turbine

A drink can, water and a Bunsen burner can be used to create a special steam turbine.

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The animation shows the way forces act on wheeled vehicles and vehicles with runners.

Sound waves all around us • Part 2

In this lesson you will learn more about how sound propagates.

Frog violin

Is a matchbox able to imitate the croak of frogs? With the following experiment we reveal the...

Hot air balloon

A hot air balloon is a balloon aircraft which is lifted by hot air.


A spacecraft on its path is in a constant state of free fall.

Seconds pendulum

How can this pendulum accurately measure time in seconds?

Let’s get to know the sources of sound!

Let's use musical instruments and our vocal cords as sources of sound.

Re-lighting a candle

Can a candle be re-lit if the flame of the match does not even touch it?

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