Exceeding the speed of sound

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

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What should we look out for in wine cellars? In this experiment we produce carbon dioxide with...

Hot air balloon

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

Suction pumps and direct action pumps

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

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.

Thermal expansion of bridges

The length of the metal frameworks of bridges change when the temperature changes.

Archimedes' seesaw

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

Submarine operation

Submarines submerge and surface by changing the average density of the hull.

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