Of course civil defence is known that the electromagnetic pulse occurs when a nuclear explosion causes massive destruction. But, of course, not every such impulse so dangerous. If desired, it is possible to make a very low power, similar to how a spark in the scales is a miniature exact replica of a giant zipper.

Sulfuric acid is among the five most strong acids. The necessity of neutralization of the acid occurs, in particular, in the case of leakage and when there is a threat of poisoning her.

Ancient glass is isotropic, inorganic substance, which first appeared in ancient Egypt and the countries of Asia. However, no matter how long and interesting his story is, not all know about its varieties, in particular of mineral glass.

In practical problems in physics and mathematics often such quantities as volume, mass and density. Knowing the density and volume of the body or substance, it is possible to find its mass.

Any object has mass and volume. And this is - an axiom. But, besides these two parameters, there is a third is density of the substance, which consists of a body (fluid). Knowing the density of the body quite easily translate volume to weight.

Knowledge about the river right and the left shore, it is necessary not only in order to pass the exam in geography. In our society accepted symbols that help us to navigate in space, to communicate the location and location of objects. In addition, all who are in any way connected with the rivers or at the place of residence, it is important to be able to determine where the river right shore. This knowledge will be useful to builders, sailing, the residents of the settlements from the river, travelers and other key stakeholders.

In our time, residents of apartment buildings are fierce war with the utilities in their provision of paid services. One such service is water supply. The quality of the provision of this service by public utilities is poor.

To translate a degree into a percent you need to know a little more detail about the object of measurement. In degrees measure angles in planar geometry and astronomy, the fortress of alcohol-containing beverages, and even the degree of dedication of the members of Masonic lodges.

Peroxide of hydrogen has found wide application in everyday life and medicine. as a disinfectant and antiseptic, and colorant. During both receiving and using it requires following certain rules.

At the decision of physical tasks is often required to translate physical quantities from one system of measure to another. As a rule, this process does not cause special difficulties. Units of homogeneous physical quantities are linked through their respective coefficients (occasionally, simple formulas). However, in practice, sometimes you have to work with heterogeneous values and translate, for example, kilograms per cubic meter

Nowadays there are often people who suffer a variety of dermatitis, eczema and other skin diseases. These diseases bring a lot of trouble, and most importantly – cause discomfort. They need certainly to fight. Excellent folk remedy against these diseases is boric acid. It comes in various forms - in the form of ointments, aqueous, alcoholic solution and powders. Powder boric acid is dissolved in water.

Tears of the sea – ancient name of amber, or petrified fossil resin. Clear light yellow stones, some with insects inside, has always been valued in the jewelry market. Real ambergem is not cheap today, however, imitation can be made independently in house conditions. Artificial amber isusually made from epoxy or other resin, sometimes with the addition of natural stone, sometimes without it.

A jet engine is a pretty exotic thing, even for talented fans of anything designed in a garage or private workshop. But if someone is full of enthusiasm and fired up a similar idea, it is unlikely that anything can stop the dream to life. The easiest design for a similar apparatus, which can collect, is valveless pulsating jet engine.

Coaxial cables, as usual, have to mend, to build, equip connectors. The need to implement these operations occurs when the cable breaks, are connected to move it to another location, connecting new devices.

In order not to fall into the trap of scammers issuing articles of silver for the platinum expensive jewelry, you have to be careful where you buy jewelry. However, if you suspected that in front of you is fake, you can do is to check and confirm or dispel your concerns.

If we need to blow something up and not get injuries, you need to ensure the safe detonation of a pyrotechnic charge. The easiest way to do this is to make the wick, which we will be able to burn at a safe distance. Here are a few ways to cook the wick.

The resistance wire shows the extent to which it prevents the passage of electric current. Measure it with tester, switched to the operating mode of the ohmmeter. If this is not possible, you can calculate it in different ways.

The globes and maps has its own coordinate system. Because of this they can be used to find any object on our planet. Geographic coordinates are longitude and latitude, these angular values are measured in degrees. They can be used to determine the position of the object on the surface of our planet relative of the Prime Meridian and the equator.

Mercury is the only metal which under normal conditions represents a liquid. It is used in the measuring devices, vacuum pumps. Compounds of mercury are used as substances, detonators, as well as in health and agriculture. All known fluorescent lamps is also lit by pairs of mercury. This substance is still used in hydrodynamic bearings are subjected to particularly heavy loads. How do you find them in the air?

The need to determine the diameter of the pipe often occurs when you replace sewer pipes, selection of towel warmer and other home jobs. It can be defined independently, for this you will need a tape measure or caliper.

The name of the French scientist and writer Blaise Pascal, who lived in the seventeenth century, called the unit of pressure used in the international system SI. It is equal to the pressure of one Newton distributed on an area of one square meter. In addition to her pressure and indicate to other units, including in the atmospheres. This measure is derived from practical measurements and is equal to the pressure of the earth's atmosphere at sea level.

Any permanent magnet can be justmagnetit, placing it in a certain way in the external magnetMr. box. The strengthening of the electro -magnets is due to the increase in the winding current or the number of its turns.

To learn how to make electron-a graphic formula, it is important to understand the theory of the structure of the atomic nucleus. The nucleus of an atom are the protons and neutrons. Around the nucleus of an atom in electronic orbitals are electrons.

There are numerous formulas for finding volume. You first need to determine what the aggregate state is the substance for which we are looking for volume. For gas volume fit some formula, and volume of solution are quite different.

In the measurement of any quantity there is always some deviation from the true value, since no instrument can not give the exact result. In order to determine possible deviations of the data obtained from the exact value, use the concepts of relative and absolute error.

In the school course of biology in high school you must have met, or will meet genetic goals. Genetics is a very interesting science. It studies the laws of variation and heredity. Representatives of any of the species reproduce like themselves. However, there is no identical individuals, all descendants to a greater or lesser extent differ from their parents. Genetics, as a science, makes it possible to predict and analyze the transmission of hereditary characteristics.

In order to successfully solve the chain of chemical transformations of one substance into another, it is necessary to study the properties of substances, their interactions and characteristics of each class of compounds. Among the qualitative objectives, the decision-chain substances are the most common.

From the point of view of the theory of electrolytic dissociation, the solutions of some compounds can conduct electric current, as the decay on the positive and negative particles – ions. Such substances are called electrolytes, which include salt, acids, bases. Most chemical reactions proceeds in solutions, and therefore between the ions, because you need to know how to write ionic equations.

Structural formula is a graphical representation of the chemical structure of the molecules of a substance, which shows the order of the atoms, their geometrical arrangement. In addition, it demonstrates the valence of the atoms entering into its composition.

In solutions of electrolytes reactions occur between the ions therefore they are called ionic reactions, or reactions of ion exchange. They are described by ionic equations. Compounds that are sparingly soluble, or volatile multicolinearity, write in molecular form. If the interaction of solutions of electrolytes is not formed any of these types of connections, this means that the reaction almost does not occur.