So how do we make hydrogen? Now we know the key concepts, let's start again at the start. To produce hydrogen from coal, the process begins with partial oxidation, which means some air is added to the coal, which generates carbon dioxide gas through traditional combustion. Not enough is ...
One power station might be able to make electricity very cheaply (perhaps because it's very new and using natural gas) while another one (using old technology based on coal) could be much more expensive, so it might make sense to use the cheaper station whenever possible. Unfortunately, ...
Hydroelectricity is the most common method of generating electricity.Wateris stored is ahigh damor an artificial or natural lake or reservoir. This water stored in a high place hasgravitational potential energy. Down this source of falling water is a power station equipped with waterturbines. Potent...
As we've already discussed, a generator converts mechanical energy into electricity. A motor works on the same principles, but in the opposite direction -- it converts electrical energy into mechanical energy. To do this, a motor needs a special kind of magnet known as anelectromagnet. In i...
If you had one neighborhood of indoor, pampered pugs and one neighborhood of unfenced basset hounds running wild, which group do you think could spread an outbreak of fleas the fastest? So, electricity needs a conductor in order to move. There also has to be something to make the ...
Lets do it from ourselves! How to build an economized society如何建设节约型社会高中英语作文 5 The earths energy is mainly underground coal and oil, and if you just use that very quickly, we need to save energy. Most of the electricity we use comes from coal, which generates billowing smoke...
When we are at home we should make full use of (充分利用) the food we have. If there is excess(过量的) food, we can share it with our friends and neighbors. It’s time for us to join hands to save food and cut waste!1. Why do supermarkets throw away lots of food?___2. Wha...
After coal mining is completed, methods such as covering vegetation are usually used to reduce pollution. What does strip mining do to the land? Coal mining creates big holes in the ground, so when the coal is removed, we need to restore the mine. We need to make a plan and repair it...
Do we have enough energy sources to meet our future energy needs? These are two important questions that many people are asking today.Some people think that man might be able to solve both problems at the same time by using all possible garbage as an energy source, and at the same time ...
That's because, as he says, we can't stop the oil from being burned for transport, since if we don't use it, another country will. But we can certainly stop burning our own country's coal. And the quickest way to reduce coal emissions is to reduce our electricity consumption. (more...