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Radial engine

Radial engines are used primarily in airplanes and helicopters.

How does it work? - Record player

This animation demonstrates the mechanism and operation of record players.


Paper was invented more than two thousand years ago.

How does it work? - PET-CT

By positron emission tomography (PET), we can obtain visual information on our internal organs without making any surgical incisions.

How does it work? - LCD screens

A liquid-crystal display utilises the light modulating properties of liquid crystals.

How does it work? - Plasma display television

This animation explains how a plasma display television works.

How does it work? - Vacuum cleaner

The vacuum cleaner creates a partial vacuum and sucks up dust with the help of the incoming high-pressure air.


This animation shows optical and radiotelescopes used in astronomical observation.

Measuring time

The first calendars and time-measuring instruments were already used by ancient Eastern civilizations.

Types of bridges

Types of bridges include beam-, arch-, suspension-, cantilever and truss bridges.

Types of gears

Two meshing gears transmit torque during their rotational motion.

How does it work? - Ballpoint pen

The invention of the ballpoint pen made writing a lot easier.

Desktop computer

This animation demonstrates the structure and most important peripherals of desktop computers.

Optical instruments

A wide variety of optical instruments are in use today, ranging from microscopes to telescopes.

The evolution of data storage

The capacity of data storage devices have increased at an incredible rate during the past decades.


Observatories are often built at high elevations to minimize the effects of atmospheric turbulence

Two-stroke engine

A two-stroke engine is a type of internal combustion engine with a cycle of only two (power) strokes.

Water turbine, generator

Water turbines convert the kinetic energy of water into electric current.

How does it work - Refrigerator

This animation demonstrates how a refrigerator works.

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