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- How to calculate power consumption
Calculation of power consumption is often made for bodies operating from the electrical energy. Maximum consumed power is called nominal and specified in the consumer or in the technical documentation. If the device does not operate in nominal conditions, the consumed power can be calculated independently. - How to calculate the volume of a cone
A cone (more precisely, a circular cone) is a solid formed by rotating a right triangle around one of its legs. Being three-dimensional body, the cone is characterized by, among other things, volume. This volume is necessary to be able to calculate. - How to determine the diameter of the circle
The segment connecting two distinct points lying on the same circle, called the "chord" and the chord passing through the center of the circle, has another name - "diameter". This chord has a maximum for the circle length, which can be calculated in several ways, using basic definitions and correlations. - How to find the edge length of a pyramid
The pyramid is a figure that has a base in the form of a polygon and the lateral faces converging at the top with peaks. The boundaries of the lateral faces are called edges. And how to find the length of the edges of the pyramid? - How to calculate the number PI
The Greek letter π (PI, pi) to denote the ratio of a circle's circumference to its diameter. This numberinitially appeared in the works of ancient geometers, later turned out to be very important in many branches of mathematics. So, it should be able to calculate. - How to calculate the angle of the triangle
Tregon define its corners and sides. The type of corners of such a trianglea squareand a sharp – all three angles acute obtuse one angle obtuse, right angle – one angle of a straight line, an equilateral triangle,a square, e all the angles equal 60. To find the angle, frictionangleand in different ways depending on the source data. - How to find the area, if you know the diameter
Knowing only the length of the diameter of the circle, you can calculate not only square the circle but also the square of some other geometrical figures. This follows from the fact that the diameters of the inscribed or circumscribed around the shapes of the circles coincide with the lengths of their sides or diagonals. - How to calculate the azimuth
When orienteering is often necessary to move it in the directions specified in advance and not on the sides of the horizon. How this can help us to compass? For movement in the direction you need the ability to calculate the azimuth, i.e. the value that characterizes the angle between the North direction and the direction to the selected landmark. - How to determine the volume of a cylinder
Cylinder as the geometric shape that may be parabolic, elliptic, hyperbolic. Even prism, by definition, is one of the private forms of the cylinder. However, in most cases under the cylinder mean shape at the base which are circles, and the angle between the side surface and the base is 90°. The following is the formula for calculating the volume of this cylinder. - How to calculate the lamp power
For proper illumination of rooms, corridors or free-standing object, such as aquarium, you need to determine the appropriate type of lamp: number, location and capacity of the installed lamps. There are a few rules, doing that, just to perform this task. - How to find out the motor power
In that case, if after a careful examination of the body of the motor was not able to find the value of its capacity, calculate it yourself. To calculate the power consumption measure the current on the windings of the rotor and using the formula find the consumed electric power. You can determine the motor power, knowing its structure and dimensions. To calculate the net power of the motor, find the frequency of rotation of its shaft and the torque on it. - How to melt the soap
To melt the soap without heat, of course, will not work. But with gas or microwave oven, ensuring that it is not difficult. To melt the soap a big piece for a very long time, so it must first be crushed. - How to convert seconds to degrees
Measure in degreesAh, minutes and seconds is most commonly used to denote geographical or astronomical coordinates. As in the time dimension, each arc minute contains 60 seconds, and the degree of fit 60 minutes. This sexagesimal system of calculation is saved from the time of ancient Babylon. But in modern systems of standardization, including those used in Russia, the SI uses the decimal calculus, so quite often you want to translate minutes and seconds to decimal degrees. - How to find the cosine, the sine of knowing
In order to obtain a formula linking the sine and cosine of the angle, it is necessary to give or to recall some definitions. So, the sine of an angle is the ratio (quotient of the) opposite side of a right triangle to the hypotenuse. Tothe sine of an angle is the ratio adjacent side to the hypotenuse. - How to melt copper
To melt copper, as well, and any other metal is better to use special equipment and work under the guidance of the master. But if circumstances made you want to study the melting of metal at home, then make a special melting furnace. - How to obtain helium
Helium is an inert monatomic gas without color, taste and smell. One of the most common elements in the Universe, second only to hydrogen. Helium is extracted from natural gas by low temperature separation process — the so-called fractional distillation. - How to find specific heat
The amount of heat required to heat a body depends on its mass, the change of its temperature and the so-called specific heat of a substance, which comprises the body. - How to convert kilowatts
Kilowatt (kW) is a unit of power, i.e. relations work for the length of time for which it is made. However, the power can be measured in other units, and kilowatts, you can easily transfer to any of them by a simple multiplication method. - How to find the frequency of the wave
The frequency of the waves is one of her most important physical characteristics. The frequency of a wave is the number of complete vibrations or cycles the wavecommitted per unit of time. If the time unit is second, the frequency of the wave measured in Hertz (Hz). - How to make boric powder
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. - How to solve double integrals
From the course of mathematical analysis known concept of double integral. Geometrically, the double integral represents the volume of the cylindrical body based on D and bounded by the surface z = f(x, y). Using double integrals to calculate the mass of a thin plate with a given density, the area of a plane figure, the area of the piece of surface, the coordinates of the center of gravity of a homogeneous plate and the other quantities. - How to solve matrix
A mathematical matrix is an organized table of elements. The dimension of the matrix is determined by the number of rows m and columns n. Under the decision matrix is understood as a set of generalized operations on matrices. There are several types of matrices, some of them are not applicable the number of operations. There is the operation of addition for matrices with the same dimension. The product of two matrices is only if they are coordinated. For any matrix is defined by determinants. Also a matrix can be transposed and to determine the minor elements. - How to calculate the error
The error is a value which determines possible deviations of the data obtained from the exact value. There are concepts of relative and absolute error. Their presence is one of the tasks of mathematical analysis. In practice, however, more important is to calculate the error of the scatter of any measured indicator. Physical devices have their own margin of error. But not only it is necessary to consider the indicator. For the calculation of error scatter σ necessary to carry out several measurements of this magnitude. - How to learn math
Mathematics is one of the most fundamental Sciences. Without having the main mathematical knowledge it is impossible to count on success in any other technical field. Without mathematics it is impossible to solve physical and chemical problems, to write programs and manage complex technology. So how do you quickly and efficiently learn mathematics? - How to find the area of the hexagon
By definition of the right of plane geometry a polygon is a convex polygon whose sides are equal and angles are also equal. A regular hexagon is the right polygon with number of sides equal to six. There are several formulas for calculating the area of a regular polygon. - How to do fraction
Common fraction - number whimsical. Sometimes you have to suffer to find the solution of the problem with the shot and present it in the proper form. Learning to solve examples with fraction, you will easily cope with this unpleasant thing. - Why the need for magnetic designer
The goal of any toy is to not only entertain the child, but to develop it aiming in the right direction intellectual ability of the baby. Magnetic designer fully meets this requirement. Collecting figures and creating new forms of magnetic parts, the child uses creative, analytical, and mathematical thinking. - How many words in the Russian language
The number of words in Russian and any other language count is difficult because this value is not constant. Some words become obsolete and are forgotten, while simultaneously arise and take its place in the language new words. - Sodium silicate: properties and applications
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. - Why the need for copper sulphate
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.