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- How to make a wick
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. - How to count the degree
We are often faced with degrees in various fields of life and even in the home. When it comes to square meters or cubic, it is said, too, about the number in the second or third degree, when we see the marking very small or on the contrary big values, is often used 10^n. And, of course, there are many formulae involving degrees. And what actions are possible with degrees and how to count them? - How to find the center of the circle
Often carpenters and joiners in the work required geometry. One of the most striking examples - the proper circle. Another task, which in this case it is possible to face the center of the circle, without resorting to special tools and complex calculations. - How to find the root of a number
To find the root of a number is not difficult. Enough to have a hand calculator, a computer or cell phone. But here there are nuances. - How to determine the velocity of the
To determine the speed of uniform motion, we need a way to separate for a while. For uniformly accelerated motion need to initial velocity added to the acceleration multiplied by time. - How to make fog
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. - How to find the area of a square
Find the area of this shape, such as square, you can even in five ways : on the side, perimeter, diagonals, radii of the inscribed and circumscribed circle. - How to solve proportions
The ability to solve proportions can be useful in everyday life. Let's say you have in the kitchen acetic essence with a 40% vinegar, and you need 6% vinegar. Without making the proportions here can not do. - How to solve equations with fractions
Equations with fractions - a special kind of equations have their own specific features and subtle highlights. Let's try to understand them. - How to calculate speed
Modern life is in constant motion: cars, trains, airplanes, all in a hurry, running somewhere, and often it is important to calculate the speed of this movement. To calculate the rate is the formula V=S/t where V is velocity, S – distance, t – time. Let's consider an example to understand the algorithm of actions. - How to translate percentage into number
Interest encountered at almost every step. Coupon promotion, the calculation of tax or other rates, different share and a fractional ratio. But the translation percentagea number is not so complicated. - How to solve equations with x
The ancient Greek mathematician Diophantus to specify an unknown number of introduced letter symbols. This files most often have in a number of unknown x, we put by default, each time making the equation or inequality. Although you can use any other non numeric character. Equation, in which in addition to numbers, only one unknown x, and their solutions, we now consider. - How to find the diameter of a circle
The diameter of a circle is a line segment connecting the pair most remote from each other points of the circle passing through the center of the circle. The word "diameter" comes from the Greek word "diametros" - cross. Typically, the diameter is denoted by the Latin letter D or the icon Ø. - How to dilute the alcohol
Pure rubbing alcohol at home sometimes is used to obtain the alcoholic beverage. However, dilute this alcohol needed in the correct proportions, and also to observe a few important rules. Otherwise consequences of the use of incorrectly diluted alcohol can be unpredictable. - How to make a generator
With the advent and proliferation of portable electronic devices appeared and the problem of their electricity supply. Excommunicated from stationary power sources for a couple of days, you can pack a couple of spare batteries. But if we need to move away from civilization for a week? How to be in this case? We need a generator of electricity. And to make you and ourselves, and in the home. - How to find the area of the shape
To be able to find the area of the shape can be useful after high school. For example, this knowledge will come in handy if you do the repair, and want to know how much paint it takes for a surface of arbitrary shape. Or if you wanted to create a flower garden, and to calculate the amount of required materials, determine its area. - How to translate Fahrenheit into Celsius
In our time, to measure temperature scale uses Celsius and Fahrenheit, the latter used mainly in the USA and the rest of the world uses Celsius. Translate the temperature scale from Fahrenheit to usual values of Celsius in several ways. - How to find the radius of the circle
The word radius radius translates from Latin as "spoke wheels, ray." A radius is any line segment that connects the center of a circle or sphere with any point lying on this circle or on the surface of this sphere, and also the length of this segment is the radiusom. To denote the radiusand the computing and mathematical expressions using the Latin letter R. - How to get sulfuric acid
Chemistry is one of the most important fields of natural science, and one of the main substances, which is unthinkable without this science is sulfuric acid. It finds application in virtually any chemical process. Simply put, sulfuric acid is the Queen of chemistry. - How to increase the amperage
Sometimes it is necessary to increase the power flowing in an electric circuit current. This article will discuss the main ways to increase the current without the use of complex devices. - How to find the cosine of the angle
Cosine is one of the main trigonometric functions. The cosineom acute angle in a right triangle is the ratio of the adjacent leg to the hypotenuse. The definition of cosine is tied to a rectangular triangle, but often the angle whose cosine is necessary to determine, in a right triangle is not located. How to find the cosine of any angle? - How to find the base of the triangle
Often in problems in plane geometry and trigonometry required to find the base of the triangle. For this operation there is even a few methods. - How to write introduction in essay
Introduction — the rationale and evidence of the importance of the topic to science, technology or specialization. It is assumed that it reveals and introduces us to a brief study of specialization. For the interest of readers and the concept of the theme just need to write the introduction at the beginning of your essay. - How to determine the mass percent of
There are two versions of the problem statement: 1) when you need to determine the mass fraction of the element in the substance; 2) when it is necessary to determine the mass fraction of the solute. - How to make living water
The person on 80% consists of water. The water we need to live. But we have long known that not all water is useful. Lately, very few people drink water from the tap. People use a variety of filters. However, the treated with fluid in the best case will not harm. Can benefit of the so-called "living water". it can be done at home.