Evolution of the bicycle

The changing bicycle, at first mocked as a toy, is a true mirror of the technical development over the last three centuries.

Constructing shapes (3D)

Building 3D shapes into a given cube mesh with the help of several views.

Transport networks

The animation presents the main air, water and land routes and transport hubs.

Safety equipment of bicycles

The highway code contains rules concerning the safety equipment of bicycles.

How does it work? - Ballpoint pen

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

Tankai (Antrasis pasaulinis karas)

Tankai buvo svarbiausia kovos sausumoje mašina Antrojo pasaulinio karo metais.

Hero’s aeolipile

Hero of Alexandria is the inventor of the first steam engine, although he regarded it as an entertaining toy.

Thermal power station (hydrocarbon fuel)

Thermal power stations convert energy released during the combustion of fossil fuels or renewable resources into electricity.

Reaction of hydrogen with oxygen

Knallgas is the mixture of hydrogen and oxygen. It will explode when ignited.

Dissolution of NaCl

Common salt is dissolved by water: polar water molecules form a coat around the ions.

Melting and freezing

During freezing hydrogen bonds are formed between water molecules resulting in a crystal structure.

Dissolution of hydrogen chloride (HCl) in water

The solution of hydrogen chloride in water is called hydrochloric acid.

Reaction of zinc with hydrochloric acid

The dissolution of zinc in hydrochloric acid produces hydrogen gas.

Producing ammonia from nitrogen gas and hydrogen gas

Large-scale ammonia production requires high temperature and pressure and the presence of iron as a catalyst.

Reaction of ammonia with hydrogen chloride

Ammonium chloride is the result of the reaction of ammonia and hydrogen chloride

Polymerisation of ethene

Polymerised ethylene is known as polyethylene, a type of plastic.

Gothic cathedral (Clermont-Ferrand, 15th century)

The cathedral named after the Assumption of Mary into Heaven is one of the gems of French Gothic architecture.

European mole

Moles are small subterranean mammals with modified, spade-like forelegs.

Thermal expansion of bridges

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

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