Quantum physics was a huge push for the development of science in the XX century. An attempt to describe the interaction of the smallest particles in a completely different way, using quantum mechanics, while some classical mechanics problems seemed insoluble, has made a real revolution.

Theoretical methods of research based on several options that allow you to give them qualitative characteristics: abstraction, formalization, analogy, object modeling, mental modeling and idealization.

The nuclei of atoms consisting of protons and neutrons, undergo various transformations in nuclear reactions. This is the key difference between such reactions from chemicals that affect only the electrons. In the course of the disintegration may change the charge of the nucleus and its mass number.

Brine is a natural brine which is naturally formed in different reservoirs with a high degree of mineralization. Rapa is of special value in medicine because it is used to treat a number of diseases.

Among all types of electromagnetic waves have the largest applicability and prevalence in nature. To distinguish the electromagnetic wave from the waves of the other type is easy, because electromagnetic waves have characteristic differences.

A transistor is an electronic device used in circuits to amplify the initial signal and is made of semiconductor materials. Bipolar transistor differs from other kinds of transistors to those used as carriers as electrons and holes.

Lightning lightning can be divided into terrestrial and vnutrioblastnaya. Cloud to ground lightning hitting from the top down, and vnutrioblastnaya to the ground do not reach. In addition to the usual lightning, there are such mysterious phenomena as sprites, jets and elves.

The lens is a transparent device, mainly from special glass designed to magnify the image. The lens is a major part of any optical system. Its principle of operation is based on refraction of light rays. To make a glass lens in the handicraft way is very difficult, especially without proper equipment in this case is not necessary. But based on the effect of light refraction, you can make a lens based on liquid.

Crystals of copper sulphate are very beautiful. In some schools chemistry students even grow them in special containers. A solution of copper sulfate is used as fertilizer for many centuries.

Astronomy is one of the oldest Sciences – all of civilization align human life with the movement of the stars in the sky. The duration of the day and year are in direct proportion to the frequency at which the Earth rotates around its axis and around the Sun. Characteristic points of the annual rotation of the Earth – the spring and autumn equinox, summer and winter solstice. To him was dedicated the dates of the holidays and the calendar of agricultural works.

Ammeter - instrument for measuring current in electrical circuits. According to the principle of ammeters are magnetoelectric, electromagnetic, thermoelectric, electrodynamic and others.

At school many people think that the wave theory of physics is boring and very confusing. But believe me, it is not so. For example, under not entirely clear, the term "dispersion" does not actually hide anything complicated.

The gradient of the scalar field is a vector quantity. Thus, its location is required to determine all the components of the corresponding vector on the basis of knowledge about the distribution of the scalar field.

Man for life essential nutrients: proteins, amino acids, monosaccharides, etc. All this is in the food, but in a complex, malosma. So the cells receive the necessary substances, the food should be subjected to splitting. This task is performed by the digestive system.

Law of Malus reflects a direct relationship between the intensity of the natural light and the intensity of the linear polarized light transmitted through the special Polaroids. They are made of tourmaline crystals.

Despite the fact that most close from us planets extremely far from Earth, distance it is of ultimate importance. And if so, it can be determined. And this was first done a long time ago – in the days of the Ancient Greek astronomer, mathematician and philosopher Aristarchus from the island of Samos proposed a method of determining the distance to the moon and its size. How can you determine the distance to planets? The method is based on the phenomenon of parallax.

The need to determine the mass of an object in the absence of weights occurs quite often. The simple weights can be made of vessel with water, but you need to know how much weight the desired amount of water.

A Twister or tornado is an air vortex, resulting in a thunderstorm cloud and propagating down to the surface of the earth. A tornado is a narrow funnel with a diameter of hundreds of meters. The word "tornado" comes from the ancient "smyrc" - the "cloud".

Salt – a chemical substance consisting of a cation, i.e. a positively charged ion, and the negatively charged metal anion acid residue. Many types of salts: normal, acidic, basic, double, mixed, hydrate, complex. It depends on the compositions of the cation and anion. How to determine base of salt?

The energy of motion and interaction of molecules, which compose the body, are called internal energy. The thermal motion of the particle never stops, so the body always has some internal energy. This energy can be changed (decrease or increase) the performance of work and heat transfer. There are three types of heat transfer: conduction, radiation and convection.

Sodium silicate is one of silicic acid salts, known as liquid glass. First it was the German chemist, Jan Nepomuk von Fuchs, in 1818. Since then, scientists use it for the needs of the food industry.

Bandwidth bandwidth is the frequency range, noise piezopolaron or filter centered selection. Band bandwidth of the intermediate frequency filter that is installed in a radio receiver depends on the selectivity of the latter adjacent channel.

If you go to the meadow in the morning, when the fresh dew covered grass, you notice the bright fresh stormy ocean of green. Green color is inextricably linked to the understanding of the people with grass. And with good reason.

If included in the electrical circuit of a single current source to different conductors and the ammeter can be observed that the readings of the ammeter when different conductors are different. This is due to the electric resistance of the portion, from which, like voltage, depends on current.

Thunderstorm — a vivid and fascinating atmospheric phenomenon. In temperate latitudes they occur about 10-15 times during the year, in the vicinity of the equator on land, from 80 to 160 days a year are the storm. Over the oceans they occur much less frequently. Thunderstorms are the companions of atmospheric fronts that leads to the displacement of warm air masses cold.

Spectral analysis is a method of quantitative and qualitative material. It is based on the study of spectra of absorption, emission and luminescence.

The power supply can be considered as electromotive force (EMF) of the current source or the voltage drop on this particular consumer. This value can be measured with a special device or can be calculated if we know the other parameters. When the network alternating current, but distinguish between effective and peak value of voltage.

The black sea is one of the most changeable and fickle. A careful study of its bottom allowed modern scholars to piece together the events by centuries of transformations, affecting not only the flora and fauna of the sea, but its littoral zone, the impact on climate zone.

In the organization of wildlife are eight levels. Each successive includes previous. Each level has its structure and properties.

Summer is a great time for travel, walking, bathing. As you know, the bathing season begins on the feast of Ivan Kupala Ilyin and ends the day. On this day comes the beginning of flowering of water.