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 A separation process or technique is a method that converts a mixture or solution of chemical substances into two or more distinct product mixtures. At least one of results of the separation is enriched in one or more of the source mixture’s constituents. In some cases, a separation may fully divide the mixture into pure constituents. Separations exploit differences in chemical properties or physical properties (such as size, shape, mass, density, or chemical affinity) between the constituents of a mixture. Processes and techniques are often classified according to the particular differences they use to achieve separation. If no single difference can be used to accomplish a desired separation, multiple operations can often be combined to achieve the desired end. With a few exceptions, elements or compounds exist in nature in an impure state. Often these raw materials must go through a separation before they can be put to productive use, making separation techniques essential for ...

 A state may be defined as a politically organised body of people inhabiting a defined geographical entity with an organized legitimate government. A state must be free from all forms of external control to exercise its sovereignty within its area of jurisdiction. It must be noted that a state differs from a kingdom and empire. Nigeria is an example of a state, while Owu is a good example of a kingdom and Oyo, an empire. In order for a state to exist, it must have the following features. Population : The most obvious essential feature of a state is its people. “States where the population shares a general political and social consensus (an agreement) about basic beliefs, have the most stable governments.” Territory : A state or country or city has certain boundaries. Conflicts can arise between states and countries over where borders should be placed. Boundaries can also be changed due to war, purchase or territory, or negotiations between governments. Sovereignty : “The key charac...

  Defining Government When you hear the word “government”, what comes to mind? Are you immediately angry or perhaps, indifferent? Do you instantly get turned off? Maybe, you’re from and live in a country where you feel the government doesn’t work for its citizens or one where the government seems to be indifferent to the plight of the masses. Government affects all aspects of people’s lives. What we eat, where we go to school, what kind of education we receive, how our tax money is spent. In fact, even what we do in our free time is somewhat affected by government. Nigerians and citizens of many other countries are often unaware of the pervasiveness of government in their everyday lives, and many are unsure precisely what it does. Government as an institution of the state Government as an institution of the state is defined as the machinery that is setup by the state to administer it’s functions and duties. It can be seen as a ‘machinery’ set up by the state, to keep the state orga...

Economics is a social science concerned with the production, distribution, and consumption of goods and services. ... Economics can generally be broken down into macroeconomics, which concentrates on the behavior of the economy as a whole, and microeconomics, which focuses on individual people and businesses. Basic Concepts in Economics 1. Wants:     Want may be defined as an insatiable desire or need by human beings to own goods or services that give satisfaction. In economics, wants are unlimited while the means of acquiring them (resources) are limited. 2. Scarcity:     Scarcity is defined as a limited supply of resources which are used for the satisfaction of unlimited wants. This means that people do not have as much as they desire. The problem of scarcity arises as a result of the fact that, at any point in time, the productive resources available in any society are limited, whereas human wants are unlimited. Scarcity is the central problem of every society. 3...

  What is Biology?     In simple terms, biology is the study of living organisms and their interactions with one another and their environments. Actually, this is a very broad definition because the scope of biology is vast. In fact, biologists may study anything from the microscopic or submicroscopic view of a cell to ecosystems and the whole living planet. Biology and Life Sciences Biology is the study of life. When you study biology you will learn about all of the different kinds of living things. You will learn where they live, what they are like, how they depend on each other, and how they behave. One of the main ideas in biology is that living things depend on each other. They are part of what is called the balance of nature. All living things interact with other living things and with the world they live in. Without these relationships, nothing would survive. Humans need plants and animals to supply us with food and raw materials, such as wood, oil, and cotton. Pla...

 We see mixtures all the time in our everyday lives. A stew, for example, is a mixture of different foods such as meat and vegetables; sea water is a mixture of water, salt and other substances, and air is a mixture of gases such as carbon dioxide, oxygen and nitrogen. Definition: Mixture A mixture is a combination of two or more substances, where these substances are not bonded (or joined) to each other and no chemical reaction occurs between the substances. In a mixture, the substances that make up the mixture: are not in a fixed ratio Imagine, for example, that you have 250mL of water and you add sand to the water. It doesn’t matter whether you add 20g, 40g, 100g  or anyother mass of sand to the water; it will still be called a mixture of sand and water. keep their physical properties In the example we used of sand and water, neither of these substances has changed in any way when they are mixed together. The sand is still sand and the water is still water. can be separated...

  What is Python? Python is a popular programming language. It was created by Guido van Rossum, and released in 1991. It is used for: web development (server-side), software development (mobile & desktop), mathematics, system scripting. What can Python do? Python can be used on a server to create web applications. Python can be used alongside software to create workflows. Python can connect to database systems. It can also read and modify files. Python can be used to handle big data and perform complex mathematics. Python can be used for rapid prototyping, or for production-ready software development. Why Python? Python works on different platforms (Windows, Mac, Linux, Raspberry Pi, etc). Python has a simple syntax similar to the English language. Python has syntax that allows developers to write programs with fewer lines than some other programming languages. Python runs on an interpreter system, meaning that code can be executed as soon as it is written. This means that prot...