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Primary research is new research carried out to solve specific issues. Secondary research is data that has already been found, it determines what is already known and what may then need to be found out. P...

Pressure is related to volume, and a larger volume means a lower pressure. The pressure in the atria is low initially as it is relaxed (diastole). Blood flows from high to low pressure, and this means tha...

Genre theory revolves around the ideas surrounding how we define and distinguish genres, and how we categorise films into genres based on usually conventional factors. Genre will often be divided by obser...

Stationary points occurs when the gradient of the graph is equal to 0, i.e. dy/dx = 0. Differentiate y with respect to x to get dy/dx = 4x + 4.So making 4x + 4 = 0 gives x = -1. Substituting this into the...

When you differentiate the function that gives the gradient. Therefore differentiate to get dy/dx= 15x^2 + 3. Make this equal to 0 to get 15x^2 + 3=0 and rearrange to get the value of x as required so 15x...