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   Elasticity is just a technical term for "Sensitivity" so Price Elasticity of Demand (PED) simply measures how sensetive Demand is to a change in price. As demand changes can be measured in an...

Hydrostatic pressure originates from the weight of the liquid. At a certain point in the liquid, the hydrostatic pressure is going to be equal to the weight of the liquid above the examined point.  So in ...

Urban decline is the deterioration of previously functioning parts of the city, an example is Hulme, an inner city area of Manchester. Urban decline is typically characterised by worsening social factors ...

using the product rule

product rule is dy/dx=v.du/dx+u.dv/dx

let u = x^2 and v = cos(x)

du/dx=2x

dv/dx = -sin(x)

so dy/dx=2xcos(x)-x^2sin(x)

There are a few ways examiners require you answer a 16 mark question. In bold are the key words. Key words can be the theory(theories), topic(s) or stems they are asking you to evaluate. Generic examples ...