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Electricity

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 Electricity Current electricity is one of the important energy for the mankind. In our daily life we need it for different aspects. To avoid darkness at night we use electric lamps. To operate radio, T.V, telephone, computer or other electric appliances, we need current electricity. Similarly electric heater, electric iron, electric motor, etc depend on current electricity. Electricity is essential to run the factories, and various industries. Source of electricity Equipments which generate current electricity are said to be the electric sources. Electricity can be obtained by different means. Some of them are discussed below.  1. Cell  2. Photo cell  3. Dynamo and generators  1. Cell: By some specific chemical reaction current electricity is produced in the cells. For example, we have dry cells or simple cells. We get current electricity by the chemical reaction inside them. Dry cells are generally used to operate the tourch light, small transistors...
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Heat as a source of energy

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              Heat as a source of energy 1          What is energy? Ans: Energy is the ability to do work 1.  What is source of energy? Ans: Source include natural gas, gasoline, coal and batteries etc form are called source of energy. Types of energy sources 1. What is renewable energy? Ans: source of energy those which are replaced after use them are called renewable energy. Hydro-Electricity, solar energy, energy from wind are the example of renewable energy. 2. What is Non-renewable energy? Ans: The source of energy are not replaced after their use called Non-renewable energy. Coal, petroleum and natural gas are an example of Non-renewable energy . Energy saving We use the energy for different purpose. But we do not care for keeping the sources for the future use. we know that non-renewable sources get depleted when they are often used 1. How to save the energy?   Turn off u...
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Why does Ukraine matter?

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  In case you don’t get it… For those who ask: “Why does Ukraine matter?” This is why Ukraine matters: It is the second-largest country in Europe by land volume and has a population of over 40 million - more than Poland. Ukraine ranks: 1st in Europe in proven recoverable reserves of uranium ores; 2nd place in Europe and 10th place in the world in terms of titanium ore reserves; 2nd place in the world in terms of explored reserves of manganese ores (2.3 billion tons, or 12% of the world's reserves); 2nd largest iron ore reserves in the world (30 billion tons); 2nd place in Europe in terms of mercury ore reserves; 3rd place in Europe (13th place in the world) in shale gas reserves (22 trillion cubic meters) 4th in the world by the total value of natural resources; 7th place in the world in coal reserves (33.9 billion tons) Ukraine is an important agricultural country: 1st in Europe in terms of arable land area; 3rd place in the world by the area of black soil (25% of world's vol...
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