How #WindPower Works : When you talk about modern wind #turbines, you're looking at two primary designs: horizontal-axis and vertical-axis. Vertical-axis wind turbines (VAWTs) are pretty rare. The only one currently in commercial production is the Darrieus turbine, which looks kind of like an egg beater.
Some Interesting Facts You Probably Didn’t Know About Apple
This economics unit includes 33 goods vs. service cards for sorting and high engagement games 9 vocabulary cards technology resources 6 student response sheets covering the concepts of goods/services, opportunity cost, and consumers/producers. 11 page early reader "What is... Economics?" for students introducing economic vocabulary and concepts covered in the unit. $