 | 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 |  | | Duration | 3h 0 min. | | Date | 20.07.2022 | | Language | |
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 | This project illustrates the principle of an 'ecological' fuel cell. Using a photovoltaic solar cell, electrolysis is carried out to separate hydrogen from the oxygen contained in the water. Then it is possible to produce electricity the other way round and lit up a small LED bulb. The ... »
illustrates, ecological, photovoltaic, electrolysis, oxygen
| | Rating |  | | Difficulty |  | | Duration | 2h 0 min. | | Date | 20.07.2022 | | Language | |
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 | Here is a little project to imitate the buzzing noise of a bees ! As with bee wings, the rapid vibrations of the elastic in the air will create sound waves. This project was developped for the magazine 'Campus Junior' of the University of Geneva. ... »
noise, vibrations, elastic, waves, geneva
| | Rating | | | Difficulty | | | Duration | 1h 0 min. | | Date | 20.07.2022 | | Language | |
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 | This project is a funny way to observe the germination of seeds. It shows that seeds initially only need water and light to grow. This project was developped for the magazine 'Campus Junior' of the University of Geneva.... »
observe, geneva
| | Rating | | | Difficulty | | | Duration | 0h 0 min. | | Date | 20.07.2022 | | Language | |
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 | A spiromètre is a medical devise that measures the volume of air inspired and expired by the lungs. This projet is a king of spirometer that allows you to keep a light ball in the air as if a magical force was holding it there. This project was developped for the magazine 'Campus Junior' of the ... »
devise, lungs, geneva
| | Rating | | | Difficulty | | | Duration | 0h 25 min. | | Date | 20.07.2022 | | Language | |
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