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- How to generate electricity
Electricity is a miracle of nature and technology today without electricity is not possible no production, the presence of current in the outlet depends comfortable stay of man in his own home. Currently, scientists are working on the question of how to obtain an electric current from the surrounding environment. It turns out there are a lot of ways. - How to solve a rational inequality
Rational inequalities - these inequalities, the left and right sides which are sums of polynomials relations. A little more about how to solve them. - How to build an electrical circuit
Electric circuit – a set of different devices and objects in which electric current flows. Assemble simple electric circuit is a snap, and it can even schoolboy. Here's everything you need to know to perform this task. - How to convert Kj to kcal
On the packaging of any food product is indicated by its energy value, which is measured in calories or joules. Sometimes the energy value is indicated only in joules, and to put that number in calories, you need to know one simple formula. - How to build a hodograph
Construction of hodographs Mikhailov with the software package "Mathcad" is necessary in order to obtain a simple and intuitive tool for solving problems on the stability of automatic control systems. The Mikhailov criterion of stability – a characteristic that is a prerequisite for the functionality of any industrial robot or manipulator. - How to sum numbers in the binary system
The binary numeral system is a positional number system with base 2. All numbers in this system are written using two symbols 0 and 1. The binary number system has a rich history and is still used in computing. It gave impetus to the development of Cybernetics. - How to make a truncated pyramid
The ability to make a model of a truncated pyramid may be required in the manufacture of certain metal parts or building structures. At the heart of this model is the model of a regular pyramid is a polyhedron whose base is the polygon and the side faces represent triangles. Have a truncated pyramid the side faces are trapezoids. The number of corners of the truncated pyramid, in the same way as ordinary ones, are triangular, quadrangular, etc. - How to translate cubic meters
When solving problems sometimes you need to translate cubic meters to other volume units. Often the container has to translate even in tons, kilograms and square meters. If you know the density or thickness of the material, the translation will not be difficult. - How to put square
When writing technical and educational texts after numbers, letters, or expressions sometimes you need to put square. It is not necessary to install special programs. To put square enough tools Word. You just need to choose the right option. - How to construct a Pentagon with a compass
Correct a Pentagon is a polygon in which all five parties and all five angles are equal. Around it is easy to describe a circle. To build the Pentagon and will help this circle. - How to draw a heptagon
If necessary, construct a regular heptagon usually have little difficulty. However, if you don't need perfect precision of drawing and accuracy of 0.2% is not critical for you, you can easily build such a polygon with a compass and a regular ruler. - How to determine the direction of the velocity
Speed characteristics of the movements of the body, characterizing the swiftness of its movement, that is, the distance traveled by them per unit time. This parameter is a vector, and therefore has not only the magnitude but also the direction. To determine the direction of the velocity is required in a number of physical tasks. - How to neutralize mercury
When broken the device containing mercury, the panic starts. This is a very dangerous chemical element with it is not a joke. Therefore, it is necessary to know how to conduct demercurization (neutralization of mercury) so as not to endanger themselves and others. The neutralization process is quite simple, but time-consuming. After the mercury is neutralized, it is better to invite experts to ensure no air pollution in its couples. - How to ice instantly
If at home you have nothing to do and want to have fun, can hold a fun and interesting experiment. All the necessary ingredients for this experience are for everyone. The experiment can be exciting and will help you to learn something new. - How to determine spring stiffness
Spring is a component of the car's suspension, which protected the car from irregularities in the road, but also provide the desired height of the body above the road, which greatly affects the handling of the vehicle, comfort and payload capacity. As a result of the tests for each vehicle select the optimum stiffness of the suspension springs under certain traffic conditions. - How to make amber
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. - How to find a point on the line
In modern mathematics a point are called elements of very different nature, composed of different spaces. For example, in n-dimensional Euclidean space a point is called an ordered set of n numbers. - How to find the area of an axial section of the cone
A cone is a geometric solid whose base is a circle and the lateral surface of all segments drawn from the point outside the plane of the base, to this base. A straight cone, which is usually seen in a high school geometry course, you can imagine how solid formed by rotating a right triangle around one of the legs. Perpendicular cross-section of the cone is the plane through its vertex perpendicular to the base. - How to calculate average value
In mathematics and statistics average arithmetic mean (or average) of a set of numbers is the sum of all numbers in the set divided by the number of them. The arithmetic mean is the most common and the most common concept of average. - How to convert Celsius to Kelvin
The most common scale of temperature measurement is the scale of Celsius, used in many countries around the world. The second most popular is considered the scale of Fahrenheit, which are oriented residents of the United States. However, scientific calculations, there is a need of translation of degrees Celsius to other units – the Kelvin. - How to separate silver from copper
The separation of silver from copper - very interesting but rather laborious process. In its pure form silver is almost impossible to meet, it is usually used with copper, then it gains strength, which allows manufacture of a product. How to obtain silver in its purest form? - How to find the domain of definition of the expression
The scope of the definition of the expression is the set of values for which this expression makes sense. To find the area of determining the best method of elimination - discarding all the values at which the expression loses its mathematical meaning. - How to breed vitriol
There is a wonderful tool to fight against pathogens of plants and insects – copper sulphate. They can be treated as trees and shrubs, fruit plants. Copper sulphate is a salt of copper sulfate. Use it particularly effectively once in five or six years, in early spring. Consumption in this case would be one gram per square meter. - How to calculate the mass of the substance
In chemical reactions involved tiny particles (atoms, molecules), and their number even in a small portion of the substance is very large. Therefore, to simplify the calculations were introduced with a special unit of "amount of substance - mole. Containing 1 Mole of 6.02*1023 atoms or molecules. How to calculate the mass of a substance? - How to identify the case of pronouns
With a pronoun as part of speech children closely acquainted at school in the sixth grade, when used in sentences words that help them to point out the subject, a sign or number. - How to build a Pareto chart
Curve or Pareto chart is a graphical representation of the Pareto law, which determines the dependence of the distribution of resources from the aggregate of many reasons. This diagram is used to identify the priorities that need to be addressed to resolve problems (for example, the presence of unsold goods, hardware problems, etc.). - How to solve integrals
The basis of the mathematical analysis is integralinoe number. This is one of the most difficult sections of the course higher mathematics. The difficulty is that there is no single algorithm which would solve all the integrals. - How to solve limit of function
The decision limits is a very important part of mathematical analysis. The limit function is not the most difficult section. So to learn how to handle limits can be pretty fast. - How to find n in an arithmetic progression
An arithmetic sequence is a sequence of numbers where each new number is obtained by adding a certain number to the previous. The number n is the number of members of an arithmetic progression. There are formulas that connect the parameters of the arithmetic progression, which can be expressed in n. - Foam: how to make it at home
The foam can be done independently at home. You do not even need special equipment. However, as such, self-made, foam may be very mediocre.