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The mole is a concept that you'll see everywhere in chemistry, from GCSE through A level. Although this is the case, it can be very easy to lose sight of what it actually is and why we use it, as your tea...

To understand how an optical fibre transfers light, we must first understand the concept of 'total internal reflection'. Whenever light is refracted from one medium to another, the refractive index of the...

Firstly i will explain how to anser the question: The question clearly states that you must explain why fatigue occurs and the effect of fatigue on a permfomer. This means on the mark scheme there is 1 ma...

Before we begin to approach this question, we first write down all the relevant formulae for this trigonometry question. We can see that we will need the double angle formulae (on account of the presence ...

Neurotransmission is when an electrical impulse travels down the axon of a neutron, releasing neurotransmitters which cross the synapses to convey messages through the central nervous system. One example ...