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All of this is to do with moving stuff over a barrier called a cell membrane.

I want you to imagine the cell membrane to be like a border of a country and the stuff to be different pizzas...

y = 2x^2 + 4x - 8y = 2( x^2 + 2x - 4)Completing the square:y = 2( (x+1)^2 - 1 - 4 )y = 2(x+1)^2 -10the vertex of graph lies at the minimum value of y, and this occurs when x = -1:y = 2(-1+1)^2 -10y = -10t...

You're right, there aren't that many devices in London. That's not a problem, though. 

Your question gives you a lot of help. You're looking for powerlessness and how it's presen...

Before you begin writing…

Read widely around the question. Research the author/ playwright, historical/ political context and critical opinions on t...

The first thing to keep in mind is that only the topics in the syllabus will be tested. Your essay question will be based around one, or a combination of the syllabus topics. For the Russian Revolution...