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Radial engines are used primarily in airplanes and helicopters.
This animation demonstrates the mechanism and operation of record players.
Paper was invented more than two thousand years ago.
By positron emission tomography (PET), we can obtain visual information on our internal organs without making any surgical incisions.
A liquid-crystal display utilises the light modulating properties of liquid crystals.
This animation explains how a plasma display television works.
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.
The first calendars and time-measuring instruments were already used by ancient Eastern civilizations.
Types of bridges include beam-, arch-, suspension-, cantilever and truss bridges.
Two meshing gears transmit torque during their rotational motion.
The invention of the ballpoint pen made writing a lot easier.
This animation demonstrates the structure and most important peripherals of desktop computers.
A wide variety of optical instruments are in use today, ranging from microscopes to telescopes.
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
A two-stroke engine is a type of internal combustion engine with a cycle of only two (power) strokes.
This animation demonstrates how solar energy can be utilized.
Water turbines convert the kinetic energy of water into electric current.
This animation demonstrates how a refrigerator works.