Windmills can only supply energy when there is sufficient wind.
Hydroelectric power stations can only work if there is sufficient water supply (I was in Sweden a few years ago, and there was not enough water in the basins to work at full capacity due to too little snowfall in the winter.)
Gravity is constantly and equally present. Why is it not converted into energy, as light is converted?
Answer
Indirectly, gravity is used to generate energy. Just think of your hydroelectric power station: snow from the mountains melts and runs down to the sea due to the action of gravity. Along the way, the movement of the water is converted into (usually) electricity. This process can only continue when the cycle is complete, so when the water from the sea also evaporates again, drifts back via clouds to the mountains and completes the circle in the form of precipitation there (simply presented).
Converting gravity directly into usable energy is not possible. Gravity sets matter in motion, which we can then use to generate electricity or the like.
Answered by
dr. ir. arch. Leen Lauriks
construction techniques from the nineteenth century; renovation of steel structures
Prinsstraat 13 2000 Antwerp
http://www.uantwerpen.be
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