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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 have hig...

Expand and simplify (5x – 2y)(3x – 4y) In this question, we are asked to 'expand' out the brackets. What this means is we need each term in one set of brackets (5x and -2y) to be multiplied by each term in t...

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 of the b...

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 resistive...

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 that for ...