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This is a possible essay question for a microeconomic exam. Let's first define what a tax is - an ad valorem tax is an indirect tax based on a percentage of the sales price of a good or service. We could ...

A sense of threat, and possibly even death, is evoked in the movement’s harmonic workings through the tritone. The first explicit tritone interval is exploited in bars 23-4, between A natural and Eb, when...

Confidence is key, and confidence comes, more often than not, with practice. Therefore, I would recommend printing out some of the practice questions from the exam board's website (provided their availabl...

The photoelectric effect is the emission of electrons from a metal surface when light is incident on it. When a photon (a light particle) hits the metal surface, it interacts with the metal's electrons. T...

Stationary points are found by considering the points at which the gradient of the function equal zero. For the above, you need to employ the quotient rule, since both numerator and denominator are f(x), ...