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The concept of scarcity acknowledges that resources in an economy are finite to produce a certain number of goods and services but that individuals needs and wants are unlimited. This results in economic dec...

Suppose we have two vectors U (a1,b1) and V (a2,b2). Hence, the distance between U and V will be given by the formula: d=sqrt((a1-b1) 2 + (a2-b2) 2 )

An unconsious action in response to a stimulus. These are very quick movements and have evolved to allow basic protection. For example, when you touch something hot, you automatically remove your hand before...

A synapse is the area between two nerve cells, allowing electrical impulses to be passed between them. In order to cross the gap from one neuron to another, the impulse gets converted to neurotransmitter - t...

The key to achieving excellent grades in A level is to make your essays as coherent as possible. In each essay you have, you should have a clear line of argument, e.g if you intend to argue to the following:...