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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 density of t...

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 rules, an alternative w...

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 digest the...

Distance refers to how far an object has travelled in total during its motion. Displacement refers to the object's overall change in position / how far an object is now, from it's initial position.

There are three key ways of ensuing you perform really well on a government and politics exam. Firstly, you need to be up-to-date with current news to ensure you have examples in your essay. Ensure that you ...