Science

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Heron's formula, or How to find the area of a triangle on three sides
What is the volume of 100 moles of mercury? Two ways to solve the problem
What is molar mass? Molar mass in chemistry and physics of gases
Formula of the density of matter. Relative Density Formulas
Surface area of a straight prism: formulas and an example of a problem
Physical quantity "density". How to find density experimentally and theoretically?
How is mechanical work measured? Formulas for gas work and moment of force. Task example
What is a path in physics and how is it denoted? Formulas and sample problem
Metals and alloys. Density tables for metals and alloys
Density of metals in kg/m3: table. Experimental and theoretical determination of density

Excel "If" function
Missile cruiser "Marshal Ustinov" after modernization will change the port of registry
Astrakhan uprising is a symbol of the Russian spirit

Aldar Tsydenzhapov: the story of a feat
Russia is a multinational country that is strong with the unity of the peoples living on its territory. This is confirmed by the feat performed by Aldar Tsydenzhapov, the hero of Russia. With his selfless actions in an extreme situation, he put himself on a par with those who defended our country during numerous wars and in peacetime
› What is robotics for schoolchildren?
› Hygroscopicity is Hygroscopicity of fibers, clothes
› What is a stone? Stone density, types and properties
› The largest freshwater lake in the world in terms of water reserves - Baikal
› Reservoir - what is it? How is it formed? Types of reservoirs
› Amorphous - what is it? Meaning, examples, interpretation
› Algae nutrition: method, food chains and types

How to spell correctly: male or cable?
How to write correctly: male or cable, when to use these words? You can smile when you hear these questions, or be surprised: “How can you ask such a thing? Are the words different in meaning? They do not know what a male and a cable are, not only children. Foreigners studying Russian may also encounter difficulties in using
› English prepositions to, at, in, on. Rules, features, examples
› Compound words with the root "Ved". Rule, features, examples
› The phrase "I was" - how to say in English?
› Character traits in English - list, features and examples
› What is the difference between single-root words and word forms? Examples of root words
› Soviet things: photo and description
› What is criminology: tasks and goals

Main titles, or What is the name of the supreme ruler in the Arab countries
Historically, for many centuries the Arab states obeyed the dogmas and norms of the religion of Islam, did not know the rule of kings and emperors. So who ruled in them, and what is the name of the supreme ruler in the Arab countries? Let's try to figure it out
› Information market: characteristics. Information technology market
› Grand Duchess Elena Pavlovna: biography, date and place of birth, wedding, baptism, family, children and date of death
› Private investigation: concept, principles and tactics
› Innate literacy: description of the concept, development methodology, advice to parents
› Seminar is Definition of concept, characteristics, features
› St. Petersburg slang: education, jargon, difference and influence on colloquial speech
› US Labor Relations Act. Wagner's law: features, history and interesting facts