about the different types of energy are written entire books.Many scientists have conducted various experiments in this area.For humanity is one of the most pressing issues.With the development of technology, we have become almost completely dependent on the power supply.Therefore, many wonder what energy, what it is and how it is used.
Various sciences give his definition of energy.For example, in physics - it is a scalar value (that is, its value can be expressed as a single number), a single measure of the various forms of movement and interaction of matter.Depending upon the energy source, the determination may change.There is such a thing as bioenergy.It refers to a field that surrounds the human being.If it is good, then the energy is positive if evil - negative.
But we will focus only on what is the energy within physics.The first type of energy that could get a man - is a fire.With the help of rubbing two sticks managed to get a spark and ignite dry branches.So people can get the heat source.With the development of civilization in the world came watermills.With the help of wheels they can perform different jobs due to the energy of the river.In Europe, already in the XI century were built windmills.
In today's world there are other forms of energy.With the development of the art there is great need for a power source.Therefore, scientists are constantly looking for new forms of energy.Not all countries and regions can use hydropower and wind stations.In recent years, many researchers have started talking about the preservation of the natural resources of our planet.For this proposed to use alternative energy sources such as the sun (through special batteries).Today, there are two ways to implement it.So it can be used as a heat source or converted directly into an electric current through the battery.The problem is that while solar energy is expensive (although the experimental house).
more promising atomic energy.It is produced by the decay of atomic nuclei.Most often used for this purpose with uranium-235 or plutonium.This type is used in a bomb, as well as specific plants, which allow to obtain heat and electricity.
But the debate about the construction of nuclear power stations are still underway.After the Chernobyl accident, it became clear that in the event of a disaster, people fall into the affected area.Radiation poisoning every living thing in the area, and this effect persists for many years.Therefore, great attention is paid to the development of safety systems.But, from the point of view of ecology, nuclear power plants are not as harmful.Hazardous emissions from them are not fixed.
So what is energy?This is a source of heat, electricity and so on.Get it in different ways.Scientists from around the world are increasingly raising the problem of depletion of natural resources: gas, oil and coal.Therefore, in today's world, more and more attention is paid to the development of alternative sources of supply.What is the energy of water, wind or sun?This is something that can be used forever.
