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The mockingbird features prominently throughout Lee's novel and is used to represent innocence. Near the beginning of the novel, Atticus tells Jem and Scott that it is a "sin to kill a mockingbird.&q...

The 'How does' question is very common in a GCSE English Literature exams. In terms of the strcuture, it is important to keep it clear and concise, for example, ordering it through ideas (parallels betwee...

It's impossible to solve an equation with two unknowns (x and y) so we must find a way to get rid of either x or y before solving an equation. Using substitution rearrange the equation 1 so x is the only ...

If we know the chemistry for a reaction we only need to know quantities from one of our reactants to calculate a product yield. For instance, in a reaction to make hydrogen peroxide, we can calculate the ...

Hydrocarbons are long chained, non-polar molecules of Carbon and Hydrogen. As the chain length increases the boiling point of oil increases and the intermolecular forces get stronger. At smaller chain len...