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What is a mole and why do we use it? (chemistry)

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 teache...
CB
13865 Views

How does an optical fibre transfer light?

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 se...
AS
Answered by Akshay S. • Physics tutor
2407 Views

Explain why fatigue may occur and state the negative effect that it can have on a performer (2)

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 mark ...
JE
Answered by Joel E. • Law tutor
4441 Views

Prove that 1/sin(2theta) - cos(2theta)/sin(2theta) = tan(theta)

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 of ...
CM
Answered by Colin M. • Maths tutor
22431 Views

Explain, using one or more examples, the effects of neurotransmission on Human Behaviour

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 of ...
ML
Answered by Maya L. • Psychology tutor
8808 Views