The magic chain

A spectacular optical illusion using a chain of closed rings.

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Steam turbine

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

Sound waves all around us • Part 1

This lesson is about the sound waves surrounding us.

Balloon on a skewer

Learn how to pierce a balloon without popping it.

The Doppler effect

This lesson helps to understand the Doppler effect.

Resonance straw

Find out how to move the straws without touching them, using the phenomenon of resonance.

Aerodynamic lift

Due to their asymmetrical profile of the wings, lift is produced while flying at a high...

Straw flute (observation)

Observe what happens when making sounds with shorter and shorter pieces of the same straw.

Torsion balances

A force can be measured by measuring the twisting of the torsion wire in a torsion balance.

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