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How does Arthur Miller present ideas about witch-hunts in The Crucible?

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 between t...
FR
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Solve the simultaneous equations (1) x + 3y = 7 and (2) 2x + y = 4

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 ter...
SS
Answered by Simon S. • Maths tutor
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How can we calculate product yield using reactants and reaction stoichiometry?

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 mas...
JP
Answered by Joshua P. • Chemistry tutor
3269 Views

Why don't Hydrocarbons and Water Molecules mix, and why might an emulsifier fix this?

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 length...
JP
Answered by Joshua P. • Chemistry tutor
8156 Views

64% of an audience are female. Work out the ratio females : males Give your answer in its simplest form.

64% are female. This 64% out of 100%. 36% are male So the ratio is 64 : 36 or 32 : 18 Can then be simplified to 16 : 9
JQ
Answered by Jordan Q. • Maths tutor
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