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Wave cut platforms are created as a cliff retreats, due to weathering at the top of the cliff and sea erosion at the base of the cliff. Coastal erosion creates a wave-cut notch at the base of the cliff, a...

The heart muscle is myogenic and initiates a heartbeat through an electrical conduction system; both the sinoatrial node and atrio-ventricular node are essential in this mechanism.

There is a simple trick to drawing the inverse of a given function. 

First, roughly sketch the original function. This means a sketch of the general shape of the curve with some key chara...

First, we must find the value of y when x = 2.

y = x³+4x+5 = (2)³+4(2)+5 = 21

Then we must find the gradient of the tangent line. This can be done by d...

Within the heart the atria contract creating a high pressure and squeezing blood into the ventricles. The semi lunar valves are closed so pressure within the ventricles builds up.Pressure within the ve...