With nitrate is familiar to gardeners, their plants fed with nitrogen fertilizers. The hunters know that she is part black (smoky) gunpowder. Occasionally nitrate is used in home cooking when Smoking meat. What it represents from a chemical point of view?

Many appliances are designed for a certain (maximum) value of the force of the current. If the current exceeds the allowable value, such equipment can fail. To lower the current a few simple methods, consisting in a series connection with the load is active or passive (ballasting) resistors.

Scientists have long wondered ideas producing diamond from graphite like the alchemists of the past, seeking all sorts of ways to create gold out of different materials.

During the calculation scheme of the power supply, it is important to calculate the parameters of the set of diodes. You should take into account the maximum voltage of the diode, the maximum diode current and the power dissipation of the diodes, which are calculated in their radiators.

Temperature (t) and pressure (P) – two interrelated physical quantities. Evident is the correlation in all three States of aggregation of substances. From fluctuations of these quantities depends on most natural phenomena.

We all know that the life of the forest is the breath of our planet. He clears the air and saturates it with oxygen. Even the familiar woods is full of amazing mysteries. Despite the alluring peace and quiet, it has the life. The forest is inhabited by many animals, birds and insects. To see it, just look around.

The majority of chemical reagents - a very dangerous substance that needs to be clearly defined rules of storage and use. They must know each employee chemical laboratory.

All animals must rest, but in appearance some of them it is impossible to say sleep or not. Similar difficulties are observed, for example, with fish. Even during sleep, their eyes remain open, which often confuses people and does not correctly interpret condition.

The weather outside does not always match the promises of meteorologists. Despite the fact that in the world there are thousands of weather stations to accurately calculate the weather can not even modern supercomputers. And all because the parameters of the atmosphere that determine weather, can be easily changed under the influence of certain factors.

Density is one of the characteristics of matter, such as mass, volume, temperature, area. It is the ratio of mass to volume. The main task is to learn how to calculate this value and know what it depends on.

In Russia grows over two thousand species of trees, but few of them are ubiquitous. Softwood is larch and pine, and deciduous – oak, aspen, alder and birch, which became a symbol of Russia.

Chemicals can be measured in kilograms or milliliters, but in moles. Mole – unit of amount of substance, which appeared due to the fact that substances are composed of molecules and atoms.

A number of elements able to paint the flame in unusual for a person of color. This is an amazing and breathtaking sight, which can be shown in the class in chemistry class, and home to your loved ones. After all, to change the color of the fire very easily.

The concentration of the acid – value that indicates what proportion of this substance is a certain quantity or volume of its solution. It can be expressed in different ways: in the form of a mass fraction, molarity, molality, etc. In laboratory practice, it is often necessary to determine the concentration of acid.

Diamond is considered the hardest mineral on the planet. He is able to cut glass. Many scientists did experiments, exposing the diamond mechanical and chemical influences. And in the end had found his weak spot: the diamond is able to burn.

The drop in the voltage across the load can be calculated if you know at least any two of the following three values: the capacity allocated at the load, current through it and its resistance. If you know more than two values, the conditions of the problem are redundant.

Renewable natural resources considered resources that can be restored within the time allowed in the scale of human life. There are several types of renewable natural resources.

Under the influence of gravity the body is able to perform work. The simplest example is the free fall of the body. The concept of the work reflects the movement of the body. If the body remains in place, the work it does.

Viscosity is a scientific term that refers to the resistance to flow of the liquid. Such resistance arises from the friction produced by the molecules of a substance, and affects how much fluid will oppose the motion of an object through it. Viscosity depends on a number of factors, including the size and shape of the molecules, the interactions between them and temperature.

Sometimes web requests are staggering: how to find the mass or volume of a triangle, square or circle. The answer is no. Square, triangle, etc. – flat shapes, the calculation of mass and volume may only have three-dimensional shapes. And under the square could be a cube or a parallelepiped, one of whose sides is a square. Knowing the parameters of these shapes, you can find the volume and mass.

Internal resistance has a current source. It appears due to the fact that there are forces that are opposed to outside forces that return charges on a pole of power in spite of Coulomb forces. By their nature they resemble the friction force. To calculate the internal resistance using Ohm's law for the complete chain.

A Newtonian fluid is any fluid substance having a constant viscosity regardless of the external voltage, which is affecting him. One example is water. From non-Newtonian fluids the viscosity will vary and depends on speed.

Fog appears when the collision of cold air and warm the earth. As a result of this collision, the water evaporating upon contact with the warm ground again rises in the cold air, slows down and condenseries. Remember this simple scheme, if you want to make fog at home.

Sometimes the body run Murashki". Different people can experience similar circumstances, and, as a rule, few people know what has caused this phenomenon?

Stray currents – electrical currents in the ground that appear when you use it as a conducting medium. Under their action occurs the corrosion of metallic objects in the ground or come in contact with it. As a rule, these objects are a shell of electric cables, various building structures and pipelines.

The law of Joule opened in 1841 and 1842, two scientists James Prescott Joule and Emilia, by Lenz. Lenz published the results of his work in 1842, a year later than the Joule, but his experiments were more accurate and the conclusion from experiments he brought earlier.

Ethanal, and ethanol belong to different classes of organic compounds. Ethanal, is aldehyde, and ethanol is included in the group of Monohydric alcohols. There are a number of qualitative reactions, which recognize acetaldehyde and ethyl alcohol, for example, during a chemical experiment, or the loss of labels from the bottles.

The process of forming the new man is a real mystery that is at the mercy of the mother nature. Strange but true - everyone was once a zygote. So what is the zygote?

Force is a vector quantity. If the vector forces arbitrarily within the coordinate system, it can be divided into two or three components. Knowing them, find the module power can be guided by the Pythagorean theorem.

Spiders – animals with unusual appearance. Someone they seem daunting, others love them and even contain house. What they can not refuse, so this is unusual. Even the number of eyes a spider differs from that of most animals.