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The private consumer does not consider the effect that their excessive alcohol consumption has on a third party and so the private benefit outweighs the social benefit. There is a welfare loss to society ...

There are 7 main word classes, so let’s focus on those for now. They are: Nouns, Pronouns, Verbs, Adverbs, Adjectives, Prepositions and Determiners. You can work out which class a word belongs to using bo...

We use integration by parts. Set $u = x$ and $dv/dx = e^x$. This leads to $du/dx = 1$, and $v = e^x$. Then:\begin{align*}\int xe^x \mathop{\mathrm{d}x} &= xe^x - \int e^x \mathop{\mathrm{d}x}\&= x...

This is one of the most common a level math question. One which is essential to understand as it gives a firm understanding of core fundamental principles in math which are Completing the square and Algeb...

A synapse is a chemical junction between a neurone and another cell. This next cell is often another neurone or a muscle cell. In this case we will describe a synapse between a two neurone cells. When an ...