Archimedes' seesaw

In this experiment, we use buoyancy to study the balance of two glasses of water.

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Hot air balloon

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

Torsion balances

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

Properties of matter: mass, volume and density

In certain cases, liquids do not mix together, and form layers instead. See what happens when we...

Rock-paper-scissors

In rock-paper-scissors, the least popular choice of players is paper. But is it really the...

Balloon on a skewer

Learn how to pierce a balloon without popping it.

Suction pumps and direct action pumps

Direct action pumps and suction pumps are among the simplest water pumps.

Frog violin

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

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