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Solar oven

This DIYs project helps to understand how the greenhouse effect can be used to 'trap' and increase the heat of the sun.   The sun's rays (short wavelengths of visible light) penetrate through the glass of the oven and heat the elements inside. When this heat is reissued as infra-red radiations ... »
greenhouse, trap, rays, wavelengths, penetrate
Rating
Difficulty
Duration2h 0 min.
Date03.02.2016
Language

Printmaking simplified

This DIYs project demonstrates the principles of printmaking.   Without the tools or materials used for linocut, this DIYs project creates prints that children can still be proud of.   As the materials used are very simple and inexpensive, it is possible to create a great number of prints and ... »
inexpensive, geneva, curious
Rating
Difficulty
Duration1h 0 min.
Date20.06.2014
Language
français english

Solar pendulum

This solar pendulum demonstrates different scientific principles : Concentration of sunlight rays with reflectors Greenhouse effect and absorption of solar radiation by dark colours Expansion and contraction of water due to temperature changes Transformation of solar thermal energy into ... »
pendulum, sunlight, rays, reflectors, greenhouse
Rating
Difficulty
Duration3h 0 min.
Date27.11.2013
Language

Solar popper

Apart from photovoltaic cells, there is another way to produce electricity with the Sun. This technique uses the Sun to heat water or air in a closed tank. High temperatures are reached by using parabolic mirrors which concentrate the Sun's rays. The heat increases the volume of water or air in the ... »
photovoltaic, tank, parabolic, mirrors, rays
Rating
Difficulty
Duration3h 0 min.
Date05.11.2013
Language

My little turbines

The construction of wind or water turbines connected to a small generator (alternator) allows to experiment two different ways of transforming motion into electricity.Most power plants in the World produce the movement required to opterate the alternator by heating water with coal, natural ... »
turbines, generator, alternator, experiment, transforming
Rating
Difficulty
Duration2h 0 min.
Date05.11.2013
Language
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