Archimedes' seesaw

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

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Find out whether the marble reaches the finish line faster on the straight or on the curved slope.

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Learn how to pierce a balloon without popping it.

Properties of matter: mass, volume and density

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

Torsion balances

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

Forces

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

Suction pumps and direct action pumps

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

The magic chain

A spectacular optical illusion using a chain of closed rings.

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