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Empirical formula is the simplest ratio of elements in a formula. chemists use it to make big molecules easier to work with when doing calculations. An example of a working out an empirical formula is; Q) He...

As is often the case in tackling English questions, there is no right or wrong answer, the key is in choosing a few strong ideas which you can support with evidence from the text and which you can communicat...

King Lear is one of those plays which Shakespeare uses to tackle a wide variety of themes, all of which can be analysed deeply individually, but also in terms of their interconnected nature. Some of the main...

There are a range of methods commonly used for differentation, but my favoured method is as follows:E.g. Differentiate 3x^21) Separate into three separate parts - the Coefficient (the number at the front, in...

Although differentiation is often taught in an abstract way, it's applications are virtually limitless. It's primary purpose is to determine the gradient of a line at a given point on a curve. Unlike with th...