The concept of using wind energy for grinding grain spread rapidly through the Middle East and was in wide use long before the first windmill appeared in Europe. Starting in the 11th century A.D., European Crusaders brought the concept home with them, and the Dutch-type windmill most of us...
In practice, wind turbines use different types of generators that aren't very much like dynamos at all. (You can read about how they work, more generally, in our main article about generators.)How does a wind turbine work? Wind (moving air that contains kinetic energy) blows toward the ...
McLaughlin: A plethora of things. We handled creating the rain. I don’t know why it landed in our lap, but we also had control over the windmill at [De Niro’s] house. We had to turn that on and off and make sure it was running properly. We had to test the...
●The quickest way to make a friend is to smile.When you smile,people think you are friendly and easy to talk to.It may not be easy at first to smile.But you can practice smiling in front of a mirror.When you look at yourself in the mirror,think if you’d rather talk to your sm...
●The quickest way to make a friend is to smile.When you smile,people think you are friendly and easy to talk to.It may not be easy at first to smile.But you can practice smiling in front of a mirror.When you look at yourself in the mirror,think if you’d rather talk to your sm...
depending on the point of view) forecasts were made. A good example is the case of nickel much discussed during my time at Metallgesellschaft AG, because we were pursuing the nickel laterite project Barro Alto in Brazil (Wellmer2008b). The journal E/MJ used to publish every year in its ...
One of the main causes of pore enlargement is excess oil productionpermanent hair removal. When your skin produces too much oil, it can clog the pores and make them appear larger. Additionally, as you age, your skin loses elasticity, which can cause the pores to stretch and become more not...
In fact, most of the things we do every day and much of the stuff we use owes a hidden debt of gratitude to these gigantic energy factories, which turn "fossil fuels" (coal, natural gas, and oil) into electric power. This energy-alchemy is a pretty amazing trick—and quite a recent...
seller. These cells came packed in a plastic box. They rattled around in the box and got a little chipped up on the edges and corners. Minor chips don't really matter too much. They won't reduce the cell's output enough to worry about. These are all blemished and factory seconds anyw...
In the 19th century, we began to use coal first to power steam engines and later for electricity, expanding its use to homes, transport and factories alike. Mid-century, the technology of refining oil was invented, and suddenly crude oil could be transformed into useful products, such as ker...