How can we store the power of the wind? Is wind the energy of the future? Which countries have most wind power? Micro-wind turbines Find out moreHow does a turbine generate electricity?A turbine, like the ones in a wind farm, is a machine that spins around in a moving fluid (liquid...
Before we can consider that question, it helps to ask something much more fundamental: how exactly do electric cars work? What's so good about them anyway—and what are the drawbacks? Can you really go to work powered by a few buzzing electrons? Let's take a closer look!
Explain how the creation of coal, graphite, diamond and buckminsterfullerene permits the required bonds to form. How can you explain the melting of ice is not a chemical reaction? How are cinder cones (volcanoes) formed from a build-up of gases?
If we are to take action against global warming, we must reduce carbon emissions. Explain how to reduce carbon emissions by using command-and-control regulation. 1. Define economic efficiency. a) Explain how to determine the efficient level of pollution and why it's usually not zero. b) Wha...
The challenge of building a car engine is to get as much energy out of each drop of fuel as possible—to make the car go as far and as fast as it can.How do we get power from petroleum?Cars, trucks, trains, ships, and planes—all these things are powered by fuels made from ...
How much energy can we get from the Sun?Solar power is amazing. On average, every square meter of Earth's surface receives 163 watts of solar energy (a figure we'll explain in more detail in a moment). [1] In other words, you could stand a really powerful (150 watt) table lamp ...
We'll need to make it ourselves from water, the magic substance that covers 70 percent of Earth's surface, is made partly from hydrogen. Split good old H2O into its parts and you get H2 (hydrogen) and O2 (oxygen). How do you do it? With an electrolyzer!
(in the 18th and 19th centuries), we'd mastered the art of burning lumps of coal to make power, so fueling things likesteam locomotives. But it can take an hour to gather enoughwoodto cook a meal, and a locomotive's boiler typically takes several hours to get hot enough to make ...
How efficiently you can heat your home (and how much it will cost) depends to a large extent on the fuel you use—which is not always something you can change easily.As this chart shows, home heating fuels vary dramatically in cost (with electricity the most expensive and coal and ...
Some vacuum cleaners do use filters like this to stop bigger particles of dust and dirt—but how do you catch smaller dirt particles as well? You could make a very fine filter or you could put several filters on top of one another, but in a vacuum cleaner they would clog up very ...