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The best way to structure an essay is by using PQA - Point, Quote, Analysis. Use this structure and 5 minuntes to plan your essay. Whilst this is annoying it will make for a better essay in the long r...

Over 1 second, electrons with drift velocity V travel through a wire of  cross sectional area A. Distance Vt (t = 1) multiplied by area A gives a volume AV. This volume multiplied by the electron dens...

cot is a short way to write 'cotangent'. This is the reciprocal of the  trigonometric function 'tangent' or tan(x).

Therefore, cot(x) can be simplified to 1/tan(x).

Using trigonometric...

Phagocytes are types of cells found in the bloodstream and tissue. They are an important part of the immune system. They recognise foreign antigens on invading pathogens and engulf them. They then dig...