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Gravitatonial potential energy

The educational resource shows a visual about gravitational potential energy: the calculation of gravitational potential energy is very easy for small heights, as it is given by the formula Ep=mgh, wh ...

The energy of material systems

The educational resource shows how the energy is the capacity to produce changes in the environment by doing work or transferring heat. This means that when a body transfers heat or does work, its ene ...

The changing Earth

The educational resource shows a Flash animation about the greenhouse effect The Earth is an open material system, because it interchanges matter and energy with outer space.

The first law of thermodynamics

The educational resource shows an interactive animation about the first law of thermodynamics:when we heat a pressure cooker, the heat we supply to the water is used to increase the temperature of the ...

Energy transfer (II)

The following visual studies the transformation of energy: the potential energy of a body can be transformed into kinetic energy in another. Some energies are transformed into others of a different ty ...

The second law of thermodynamics

The educational resource shows an interactive animation about the second law of thermodynamics for heat engines: it is not possible to achieve perpetual motion based on continuous reciprocal conversio ...

Work of friction

The forces of friction, which oppose displacement, also carry out work when a body is moving. The work of friction is converted into heat. The greater the force of friction, the more force must be exe ...

Energy sources

The educational resource shows information about the energy sources: energy sources are the resources which exist in nature from which human beings can obtain energy which they can use for their activ ...

Wind energy

The educational resource shows information about the concept windy energy and its advantages and its disadvantages.

Thermal energy

The educational resource shows information about the concept of thermal energy: thermal energy is due to the movement of the particles which make up matter. The particles of a body at a low temperatur ...

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