propeller

Energy saltwater
This project is very easy to do! Needed: An aluminum can. A sheet of copper foil of 0.3-0.4mm. Two insulating rubber spacers. An engine of a cd rom 2-3 volts, to be recovered from the inside of a PC. 1 liter of water with 3-4 tablespoons of salt for foods.The duration of rotation of the […]
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