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Stirling engine - hot-air engine

Stirling engines are also known as external combustion engines. Unlike internal combustion engines (e.g. Otto-engine), here combustion takes place outside...

Radioactivity

The process of the decay of unstable nuclei is called radioactivity.

Forces

The animation shows the way forces act on wheeled vehicles and vehicles with runners.

Radial engine

Radial engines are used primarily in aeroplanes and helicopters.

Kepler space telescope

The Kepler space telescope was launched by NASA to discover Earth-like planets orbiting other stars

Submarine operation

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

p-V-T diagram for ideal gases

The relationship between the pressure, volume and temperature of ideal gases is described by the gas laws.

DC motor

DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.

Phases of the Moon

During its orbit around the Earth, the visibility of the Moon's illuminated part constantly changes.

Aerodynamic lift

Due to their asymmetrical profile of the wings, lift is produced while flying at a high speed.

Jupiter

Jupiter is the largest planet of the Solar System, it has two and a half times the mass of all the other planets combined.

Mars

Possible traces of water and life are sought on Mars.

Mercury

Mercury is innermost and smallest planet of the Solar System.

Neptune

Neptune is the outermost planet of the Solar System, the smallest of the giant planets

Saturn

Saturn is the second largest planet in the Solar System, easily recognisable by its rings.

Uranus

Uranus is the 7th planet from the Sun, a gas giant.

Venus

Venus is the 2nd planet from the Sun, the brightest object on the night sky (after the Moon).

Formation of hydrogen molecules

Hydrogen atoms within hydrogen molecules are held together by a covalent bond.

Melting and freezing

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

Space Shuttle

The Space Shuttle was a manned, reusable spacecraft operated by NASA.

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