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- How to distinguish platinum from silver
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. - How to find the charge of the capacitor
In engineering and physics problems sometimes you need to find the charge of the capacitor. Direct measurement of the chargeand capacitor – the task is quite time consuming. Therefore, in practice, there are more affordable ways of finding the charge ofa capacitor. - How to compare the roots
The root of the n-th degree of a real number a is a number b for which the equality b^n = a. The roots of an odd degree exist for positive and negative numbers, and roots of even degree, only a positive. The value of the root is often an endless decimal fraction, which complicates the exact calculation, so it is important to be able to compare the roots. - How to make powerful electromagnet
To make a powerful electromagnet, take a good magnetic core, wrap it in an insulated conductor, and connect to the current source. The power of such an electromagnetand can be adjusted in various ways. - How to determine the resistance of the resistor
To determine the resistance of the resistor, it is easier and safer to just measure it with an ohmmeter or multimeter. However, this method is not always available, starting with the basic lack of the necessary instrument, to physical inaccessibility of a part. In addition, before measurement of resistance of the resistor must desoldering from the circuit, but it is not always possible. In this case, will the determination of the resistance of the resistor by its markings. - How to find angle if you know its tangent
The tangent of an angle is a number which is determined by the ratio of opposite and adjacent to this angle of the legs in the triangle. Knowing only this ratio we can find out the size of angle, for example, using a trigonometric inverse tangent the inverse tangent. - How to calculate the cosine of the angle
Cosine one of the trigonometric functions, which is used in the solution of geometric and physical problems. Actions with vectors also, rarely do without the use of a cosine. There are several ways to compute the cosine of the angle from the simplest arithmetic to the decomposition in a Taylor series. The choice of method depends on the required accuracy of values of the cosine. - How to explore the continuity of functions
Continuity is one of the basic properties of functions. The decision on whether this function is continuous or not, gives an indication of other properties of the studied function. It is therefore important to examine the function for continuity. This article describes the main methods of study of functions for continuity. - How to calculate the volume in liters
To calculate the volume of a body or substance to litersyou need the quantity expressed in other units. If body volume is unknown beforehand, it can be calculated using mass and density. For measuring mass and density, there are special methods and tools. - How to convert tons unit tons
All types of organic fuel - oil and its derivatives, gas, coal, firewood, peat is not equivalent to incineration. They have different energy reserves. But for calculations it is necessary to know the quantity stored in them energy. Therefore, for convenience of calculations in power engineering uses the concept of conditional fuel. Conventional fuel is called the fuel, the heat of combustion is equal to 7.000 kcal. 1 kg. - How to measure resistance with a multimeter
Sometimes a situation arises when you need to measure the resistance of the power cord (possible breakage) or to test the fuse, bulb, faulty heating element, and the like. With the help of multimeter these tasks are easy. - How to parse a word into sounds
The word that you speak is made up of sounds. To analyze the sound structure of words teach students in the elementary grades. Explain to them how the sounds are formed and which groups are divided. How to disassemble the word into sounds? What to pay attention in the first place? - How to convert meters to acres
The weaving is called a measure of area, usually of land, equal to one hundred square meters. Also to denote measures of area equal to the area of square with side 10 meters, using the concept of the ar. In fact, weaving and art are absolutely identical concepts. - How to find the hypotenuse of an isosceles triangle
Isosceles triangle — a triangle in which two sides are equal. Equal sides are called lateral, and the last base. The triangle is rectangular if UD corners direct, that is equal to 90 degrees. The side opposite the angle to ninety degrees is called the hypotenuse and the other two - legs. - How to measure the circumference
The human brain has a remarkable property – it removes your "backyard" the information that us is not actively used. Therefore, even the most simple mathematical rules and formulas learned in school, it is necessary to periodically refresh your memory. And if they are not already there to download it. Such information includes the formula to find the length of the circumference. - How to get Bhutan
Gas butane is widely used in industry, agriculture and the food industry. Of butaneand its isomers get butyric acid, butanol and other substances that are used in unchanged form or as raw material to produce other chemicals. There are three methods of obtaining this gas. - How to calculate population density
In the preparation of various forecasts, along with other measures usually need to know the density of the populationliving on a given territory. It is necessary to find out what human resources has a region now and some will have in a few years, what social institutions are required now and in what quantity, etc. - How to find a private speed boat
The solution of problems on motion on the water" for many is difficult. In them there are several types of speeds, so decisive start to get confused. To learn how to solve problems of this type, it is necessary to know the definition and formula. The ability to make the scheme facilitates the understanding of the problem and contributes to the correct preparation of the equation. A correctly written equation is the most important thing in solving any type of task. - How to build a hyperbole
In elementary and higher mathematics found such a term as hyperbole. The so-called graph of the function, which does not pass through the origin and consists of two parallel curves. There are several ways of constructing the hyperbola. - How to measure a magnetic field
Under a quantitative measure of the magnetic field, understand its induction. To take measurements of the magnetometer and set the sensor at the desired point in space, and then take readings. This can also be done with the help of the magnetic needle, which calculate its magnetic moment. When exposed to an alternating magnetic field in a conductor electromotive force occurs. Measure and calculate the magnetic induction. - How to write "bearing in mind"
The Russian language has a large number of homonyms (words that sound the same). In addition, these words can even relate to different parts of speech and written quite differently. An example would be "inmind" and " mind". Not to be mistaken in the correct spelling of these words, just follow the simple algorithm. - How to find the bisector of isosceles triangle
Have an isosceles triangle two sides equal, the angles at its base will also be equal. Therefore the bisectors drawn to the lateral sides are equal to each other. Bisector drawn to the base of an isosceles trianglewill be both a median and a height of this triangle. - How to distinguish a brief communion from short adjectives
In the Russian language the participle and the adjective are two different parts of speech. The adjective refers to the features of the subject, while the participle denotes a characteristic of the object by its effect, i.e., is a special form of the verb. As the communion has the properties of the adjective, sometimes it is confused with the latter. Special difficulties are short forms of participles and adjectives that are pronounced the same way. - How to calculate the rate of inflation
To create a business plan as close as possible to reality, it must be taken into account the factor of inflation, which over time depreciates in circulation cash. Inflation affects almost all aspects of the financial activities of any company. Particularly this factor affects the long-term conduct financial transactions. - How to count the limits
In textbooks on mathematical analysis devotes considerable attention to techniques of computing limits of functions and sequences. There are rules and methods using that you can easily solve relatively complex problems the limits. - How to determine the valence on the periodic table
Table of Dmitry Mendeleev is a universal reference by which to know the necessary information about the chemical elements. The most important thing – to know the basic principles of its "reading," that is, you need to know how to use this information material, which will serve as a great help for the solution of any tasks on chemistry. Moreover, the table is allowed on all types of control of knowledge, including even the exam. - How to determine where on the river right Bank
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. - How to determine stopping distance
Any motorist should be able to determine the braking path. From this often depends the safety of the driver and those in the car besides him. What is the braking path and how to define it, to avoid trouble on the road? - How to convert joules to calories
Joule is a unit of measuring the amount of heat used in the international system of units (SI - Systeme International d'unites). It is often used in physics and in heat has more common non-si unit called "calorie". The parallel existence of these units from time to time is the need of converting values from one to the other. - How to convert watts
When used in the calculation of such physical quantities as power, is often required to transfer watts to other units. The task is complicated by the fact that the technique still used obsolete units of measurement of power, such as "horsepower". But with all of the necessary tables and formulae, translate watts quite easily.