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What is resistivity in S.I. units?

First, we know our equation for resistivity rho = RA/L. We know that L and A are in [m], which are already in SI units - however, [ohms] are not SI units. We do know, however, we know that R = V/I, and that ...
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Answered by Laura U. • Physics tutor
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With reference to a named psychological theory, outline how the negative attitude of an individual or of a team can be changed. 4 marks

The Persuasive Communication Theory can be used to change a negative attitude of a performer. This theory typically involves a coach persuading the individual performer to adopt a more positive attitude. To ...
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How do I include context in my literature essay?

Context is key to the top marks in a literature essay and it is best applied subtly to bring greater depth to your main points. Context can explain why a poet has used a particular technique or add a richer ...
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Answered by Hannah K. • English tutor
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Explain how FHS and oestrogen illustrate the principle of negative feedback during the menstrual cycle, and explain therefore why oestrogen may be used as a contraceptive.

FHS is released from the anterior pituitary gland in the brain and causes the follicle to develop in the ovary. the developing follicle produces and secretes oestrogen. This release of oestrogen stimulates t...
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Answered by Catrin P. • Biology tutor
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Why does the chain rule work?

One of the best ways to view dy/dx is as a fraction. When we have y=f(g(x)), we need to make a substitution u=g(x) to find dy/dx. This leaves us y=f(u) and u=g(x). Differentiating said terms leaves us with d...
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Answered by Sam V. • Maths tutor
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