The conic section is a plane curve that is created when a right circular cone is intersected by a plane.
The staggered conformation of ethane is more stable than the eclipsed conformation.
A fuel cell provides environment-friendly electric energy produced by the chemical reaction between oxygen and hydrogen.
This animation explains the technology of shale gas extraction.
Scoliosis is a medical condition in which a person's spine has a lateral deviation.
Electric current can be generated by rotating an armature loop in a magnetic field.
Keeps were typical buildings in the Middle Ages, also built independently from castles.
One of the most common types of flatworms.
Learn the concept of colours, numbers, letters and shapes while playing
Electrochemical processes in a lead-acid battery produce electric current.
The Voyager space probes were the first man-made objects to leave the Solar System. They gather data about outer space and carry information about humanity.
The marathon running event was instituted in commemoration of the run of a Greek soldier after the Battle of Marathon, fought between the Athenian and the...
This animation demonstrates instruments used to examine atmospheric phenomena.
The battle of the Greek-Persian War became famous for the heroic sacrifice of the Spartan soldiers.
Satellites orbiting the Earth can be used for civilian or military purposes.
The Channel Tunnel is a 50.5 km long railway tunnel between the United Kingdom and France, beneath the English Channel.
The products of oil refining include diesel oil, petrol and lubricants.
The castle of Eger got its final shape and became an important component in the new chain of border forts in the 16th century.
This animation demonstrates how lifts work.
The animation shows the forms of government and official languages of the world´s countries.