Eskom's two chief executive officers, Brian Molefe and Matshela Koko,refused to sign the power purchase agreements. This was the apex of the government's failure to address the energy crisis. The factories that had opened up to manufacture windmills and solar panelsstarted ...
In 1927, the brothers Joseph Jacobs and Marcellus Jacobs opened a factory to produce windmills for farm use. Steam engine Thomas Newcomen was an English inventor who created the first practical (实用的) steam engine for pumping water (抽水). ...
His parents didn’t have enough money for him to go to high school. They were worried. They knew how 【3】school was and how good it would be for him.William couldn’t go to school. However, he could go to the library. One day William 【4】 a book with windmills (风车) on the...
Wind makes windmills spin(旋转). When the windmills spin, they make electricity. A lot of people think that wind power is new, but that's not true. For thousands of years, people have used wind to sail boats and move water.We still do those things today, but these days we mostly ...
Using 3-4 complete sentences, explain the role of both types of transformers in getting electric energy from an electric power plant (coal-fired, natural gas, or nuclear) to our homes. Name the process used for producing ...
According to the US government, wind farms off the Pacific coast could produce 900 gigawatts of electricity every year.Unfortunately, the water there is far too deep for even the tallest windmills to touch bottom.An experiment under way off the coast of Norway, however, could help put them an...
For centuries, farmers have used windmills to pump water, crush grain and perform other tasks. Today, farmers can earn money with high-powered wind turbines (发电机) that produce electricity. Wind power hasbecome big business, especially in Europe. In the United States, less than one percent ...