Introduction Have you ever played with a toy pinwheel—or seen larger real-life versions, such as a windmill or wind turbine? Have you wondered why they look the way they do—with multiple blades, ...

Introduction Wind energy is becoming more and more popular across the U.S.—maybe you’ve even seen a wind farm close to where you live! In 2015 approximately 7 percent of the electricity used in the ...

At first glance, it looks almost harmless. Small, light, and simple — more like something you’d see spinning in a garden than producing electricity. While most wind turbines stand still and wait for ...