Analysis of BarThelmes The Balloon Essay Samples and Topic Ideas

balloon turns and the sun shines, the wind will continue to exist. People have been using wind energy for thousands of years. The windmills we know were invented in the ninth century in eastern Persia and arrived in Europe at the end of the 12th century. The first wind mills were mainly used to grind grain. The wind mill was generally wood, sometimes brick, equipped with wings moved by wind and driving devices. It is the oldest wind engine, converts wind energy into kinetic energy in rotation motion. It is the predecessor of the wind turbine, which is also commonly called wind mill. Currently, the most common are the 3 -blade wind turbines with a horizontal rotation axis, an adjusted rotor ‘to...