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The translation of the imperfect tense would be "I used to do/ I was doing". Hence, this tense would be used to describe an action in the past that had an unspecified starting or finishing time,...

As this is a factor based question it is important to first identify the crucial factors that led to Hitler’s appointment as Chancellor in January 1933. To begin this process I would spend the first part ...

If you have an expression like 6x^2, to integrate it you have to add 1 to the power. Therefore, the new power will be 3. Then divide the whole expression by the new power so it will be 6x^3 divided by 3, ...

Solution of all integration problems starts with investigation of a given function. We can’t represent it with standard functions, i.e. linear, power or trigonometric. Second step would be to try substitu...

Let’s look closer at the sodium atom. Really close, so we could see. Atom is a neutral species, with 11 protons in the nucleus. We can find that information in the periodic table. 11 proton charge should ...