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This animation demonstrates the type of engine most commonly used in cars.
The Moon is the Earth's only natural satellite
Space probes and Mars rovers examine the structure of Mars and possible traces of life.
A demonstration of nearby planets, stars and galaxies.
The formation of the Sun and the planets started with the contraction of a dust cloud about 4.5 billion years ago.
This animation explains transparency and opacity, the principle of radiography, and the light-absorbing properties of materials.
This animation introduces the studies of astronomers and physicists whose works fundamentally changed our view of the universe.
One of the most modern means of transportation is the Maglev, capable of traveling at speeds of over 400 km/h (248.6 mph).
This animation demonstrates the structure of nitrogen molecules, with one sigma and two pi bonds holding the atoms together.
A phase transition is the transformation of a substance from one state of matter to another.
This animation shows the electron configuration of the calcium atom.
The Rutherford Experiment proved the existence of positively charged atomic nuclei. The results led to the elaboration of a new atomic model.
The steam engine, perfected by the Scottish engineer James Watt, revolutionized technology.
While generators convert mechanical energy into electrical energy, electric motors convert electrical energy into mechanical energy.
Energy released during nuclear fission can be used for civilian or military purposes.
Major phases in the history of theories and views about the structure of the atom.
In benzene there are sigma bonds and delocalized pi bonds between carbon atoms.
Bats use ultrasound to navigate and hunt for prey.
The three important laws describing planetary motion were formulated by Johannes Kepler.
Mechanical bell that functions by means of an electromagnet.