 | In order to adjust a central heating and save energy, room temperatures must be measured with a thermometer. The thermometer was invented in the 17th century and its working principle is still used today. Household thermometers contain, inside a glass tube, a small amount of coloured alcohol ... » adjust, thermometer, thermometers, tube, expands
| Note |  | Difficulté |  | Durée | 2h 0 min. | Date | 08.05.2013 | Langue(s) | |
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 | The Pet Star water rocket car is an environmental friendly vehicle. A Pet bottle is used to stock air and water. The air is pressurised with a bicycle pump . The water is expelled because of this great pressure and pushes the car forward (action<>reaction principle). This DIYs project helps to ... » rocket, pressurised, bicycle, pump, pushes
| Note |  | Difficulté |  | Durée | 10h 0 min. | Date | 06.05.2013 | Langue(s) | |
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