Properties of matter: mass, volume and density

In certain cases, liquids do not mix together, and form layers instead. See what happens when we pour water over raspberry syrup.

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Torsion balances

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

The development of celestial mechanics

This animation introduces the studies of astronomers and physicists whose works...

Kepler´s laws of planetary motion

The three important laws describing planetary motion were formulated by Johannes Kepler.

String saw

In this experiment we prove that it is possible to cut a bottle with just a string.

Forces

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

Archimedes' seesaw

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

Exceeding the speed of sound

What is the speed of sound? What happens when an object exceeds the speed of sound?

Hot air balloon

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

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