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what are the power plants available in Tamilnadu?
Solar Energy : The most important supplier of energy for the earth is the sun. The whole of life depends on the sun’s energy. It is the starting point for the chemical and biological processes on our planet. [ At the same time it is the most environmentally friendly form of all energies, it can be used in many ways and it is suitable for all social systems. In the core of the sun a fusion
process takes place in which pairs of hydrogen nuclei are fused into helium nuclei. The energy thus released is radiated into space in the form of electromagnetic radiation. As the sun is 143 million km from the earth it radiates only a tiny fraction of its energy to the earth. In spite of this, the sun offers more energy in a quarter of an hour than the human race uses in a whole year. The age of the sun is estimated by astrophysicists to be about 5 billion years. With a total life expectation of 10 billion years the sun will be available as an energy source for another 5 billion years. Hence from our human perspective the sun offers an unlimited life - Solar power plants! ]
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Asked 8/27/2011 8:54:59 AM
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Weegy: What causes wind? Wind is caused by air flowing from high pressure to low pressure. [ Since the Earth is rotating, however, the air does not flow directly from high to low pressure, but it is deflected to the right (in the Northern Hemisphere; to the left in the Southern Hemisphere), so that the wind flows mostly around the high and low pressure areas. This effect of the wind "feeling the Earth turn underneath it" is important for very large and long-lived pressure systems. For small, short-lived systems (such as in the cold outflow of a thunderstorm) the wind will flow directly from high pressure to low pressure. The closer the high and low pressure areas are together, the stronger the "pressure gradient", and the stronger the winds. On weather maps, lines of constant pressure are drawn (as in the example, above) which are called "isobars". These isobars are usually labeled with their pressure value in millibars (mb). The closer these lines are together, the stronger the wind. The curvature of the isobars is also important to the wind speed. Given the same pressure gradient (isobar spacing), if the isobars are curved anticyclonically (around the high pressure in the above example) the wind will be stronger. If the isobars are curved cyclonically (around the low pressure in the example above) the wind will be weaker. Near the surface of the Earth, friction from the ground slows the wind down. During the day, when convective mixing is stirring up the lower atmosphere, this effect is minimized. At night, however, when convective mixing has stopped, the surface wind can slow considerably, or even stop altogether. Wind can be thought of one way that the atmosphere moves excess heat around. ] (More)
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