 | 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
| | Note |  | | Difficulté |  | | Durée | 2h 0 min. | | Date | 03.02.2016 | | Langue | |
|
 | 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
| | Note | | | Difficulté |  | | Durée | 3h 0 min. | | Date | 27.11.2013 | | Langue | |
|
 | The construction of a solar hot water panel helps to understand how it is possible to heat water with the Sun. The basic principle is to circulate water in a black pipe placed behind a glass exposed to the Sun. Thanks to the greenhouse effect and the black colour that absorbs most of the Sun's rays, it is ... »
circulate, pipe, greenhouse, absorbs, rays
| | Note |  | | Difficulté |  | | Durée | 2h 30 min. | | Date | 31.05.2013 | | Langue | |
|
 | Bulding a bicycle electricity generator helps to understand how it is possible to produce electricity from a magnet, a copper wire coil and a movement. This technique found in traditional bicycle dynamos is also used in electric power stations. Unfortunately less bicycles are equiped with ... »
bicycle, generator, magnet, wire, coil
| | Note | | | Difficulté | | | Durée | 3h 0 min. | | Date | 24.05.2013 | | Langue | |
|
 | Building this DIYs project helps to understand how wind turbines work and generally how to transform a mechanical movement into electricity. This principle can be found in devices we use every day (bicycle dynamo, car alternator, etc.). The same principle is also used by most of our electricity ... »
turbines, transform, bicycle, dynamo, alternator
| | Note | | | Difficulté | | | Durée | 2h 0 min. | | Date | 24.05.2013 | | Langue | |
|
|
Sélection/Recherche 
