The law of conservation says that energy is neither created nor destroyed. When we use energy, it doesn’t disappear. We change it from one form of energy into another. A car engine burns gasoline, converting the chemical energy in gasoline into mechanical energy. Solar cells change radiant energy into electrical energy. Energy changes form, but the total amount of energy in the universe stays the same. Scientists at the Department of Energy think they have discovered a mysterious new form of energy called "dark energy" that is actually causing the universe to grow!
The simplest way to define energy is said by: the capacity to do work by moving matter against an opposing force. If neither the table nor pencil moves, no work is done and therefore no energy is transferred. Force and energy are just a physical definition in a model that eases 'understanding' of the world around us. With this model one can define many things like the conservation of energy , transferring of energy ,etc.
There are different kinds of energies like kinetic, thermal, heat, electrical, solar, potential and many more. These energies are transferred and obtained from different sources, which are namely classified as renewable and non renewable sources of energy.
It is recognized that non-conventional or alternative sources of supply will undoubtedly play an increasing role in development as growth proceeds. Virtually none of these sources, however, should be viewed as being free of environmental impacts; in fact, they may, in some cases, have significantly greater effect on the environment. From an energy perspective, the alternatives range from nuclear power through geothermal and biomass energy to solar, wind, tidal and hydropower. The importance of these alternative energy sources in the energy mix within the region and with respect to their environmental impacts is enormous.
With both energy and minerals, the technical opportunities... [continues]
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