Much of the world around us obeys the laws of physics.This is not surprising, because the term "physics" comes from the Greek word, means "nature."And one of these laws are constantly working around us, it is the law of Bernoulli.
law itself appears as a consequence of the principle of conservation of energy.This interpretation allows us to give him a new understanding of many previously well-known phenomena.To understand the essence of the law just enough to remember the flowing stream.Here he runs, runs between the stones, twigs and roots.In some places it is made wider, somewhere already.It may be noted that where the stream is wider, the water flows more slowly, which already, the water flows faster.This is the Bernoulli principle, which establishes a relationship between the pressure in the fluid flow and speed of the flow.
However, his physics textbooks formulated somewhat differently, and it is related to hydrodynamics, and not to the flowing stream.In a fairly popular form of Bernoulli's law can be summarized in this version - the pressure of the fluid flowing in the pipe above where its velocity is less, and vice versa: where speed is greater, the pressure is less.
to confirm sufficient to carry out a simple experiment.You take a piece of paper and blowing along it.Paper rises up in the direction along which the air flow.
very simple.As the law says Bernoulli, where the speed is higher, the pressure is less.Hence, along the sheet surface, where the flow of air pressure is lower, and the bottom sheet, wherein there is no air flow, the pressure is greater.That sheet and lying at the side where the pressure is lower, i.e.where the air flow passes.
This effect is widely used in everyday life and in art.As an example we can consider the gun or airbrush.They used two tubes, a larger cross-section than others.That which is of larger diameter, attached to a container with paint, according to that of smaller section passes at high velocity air.Due to the pressure difference arising paint enters the air stream and this stream is transferred to the surface to be painted.
The same principle can operate the pump.In fact what is described above, and that the pump.
No less interesting is the law in the application of Bernoulli for draining the marshes.As always, everything is very simple.Wetlands ditches connected with the river.The flow in the river is, in a swamp there.Again, there is a pressure difference, and the river begins to suck the water out of wetlands.There is a neat demonstration of the law of physics.
impact of this effect may be, and destructive.For example, if two ships will be close to each other, then the rate of movement of water between them is higher than the other.As a result, an additional force will arise, which will attract ships to each other and the disaster will be inevitable.
can express all the above in the form of formulas, but the Bernoulli equation to write is not necessary for an understanding of the physical nature of this phenomenon.
To better understand the present one more example of the use described by the law.All represent a rocket.In a special chamber the fuel is combusted, and the jet stream is formed.To accelerate it uses a specially narrowed area - nozzle.There is an acceleration of the jet gas, and as a result - increase in jet thrust.
There are many different options for using Bernoulli's law in the art, but to consider them in the framework of this article is simply impossible.
So Bernoulli formulated the law, the explanation of the physical essence of the processes, with examples from nature and technology shows the possible applications of this law.
