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When writing an essay, it is imperative that you close read quotations from the set text you are studying. However, this can be tricky- particurarly if you are not familiar with poetic devices, rhetoric a...

Profit maximising is where a company sets a price and quantity that gets the company the highest profit possible. Profit maximising tends to occur in markets with low competition where the companies ha...

Equipotentials are lines of constant potential. In radial fields they join points of equal potential and are perpendicular to the field lines.
They are concentric spherical surfaces about the centre ...

An oscillation is damped if resistive forces are present e.g. air resistance or friction.
The amplitude of the system will decrease over time, as opposed to a free oscillation which is undamped (no r...

The moment of a force about any point is defined as the force x perpendicular distance from the line of action of the force to the point - moment = F x d the unit is Nm.
Principle of moments states t...