“The same wind that used to pump water for cattle is now turning giant wind turbines to power cities and homes.” “The blades only turn about 18 RPM, not nearly fast enough to create electricity, so the rotor shaft spins a series of gears that increase the rotation up to 1800 RPM. At that speed …
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One World Trade Center hit a milestone at the end of January when it passed the 90th floor and became the most expensive building in the world. Now, with construction passing the 93rd floor, it’ll soon hit another milestone: in the next few weeks, it will pass the Empire State Building to become the tallest …
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