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A parametric equation is one that is defined in terms of a single parameter, usually called t. This means that, instead of the standard geometric equation, where y and x are defined by each other, e.g. y=3x,...

A complex number is one that is made up of a complex and real part, they can all be written as: a+bi, where a and b are real numbers. The thing that makes the number "complex" is "i", the...

A moment is the turning force that is exerted at right angles (perpendicular) to a pivot. For example, on a see-saw, the moments would be the forces exerted on each end by the people sat on it. If the see-sa...

Standard form (sometimes called standard index form), is a way of writing out numbers. It is especially useful when it comes to VERY large or VERY small numbers, which normally would take lots of time (and p...

​What is diffusion? Diffusion is a natural process, definied as the net movement of particles from an area of high concentration to an area of low concentration . But what does this mean? Imagine you're goin...