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Explain how the human eye has both high sensitivity and high acuity.

The human eye has high sensitivity because many rods connect to a singular neurone, so many weak generator potentials combine to reach the threshold and trigger an action potential. The human eye has a high ...
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Answered by Anna M. • Biology tutor
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State Faraday's Law of electromagnetic induction, both qualitatively and quantitatively. How is Lenz's Law included in this? (4 marks)

emf= (-) d(magnetic-flux)/dt (1 mark) Faradays law of induction states that the electromotive force induced in any closed circuit is equal to the negative rate of change of magnetic flux enclosed in the circ...
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Answered by Mabast H. • Physics tutor
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What were the origins of the First World War?

Points that student should remember before answering this question: Historiography and historical debate Argumentation + essay structure Be confident in your argument Point, explanation, proof The origins of...
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Answered by Francesca E. • History tutor
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What is sleep and do we really need it?

The restoration theory of sleep (Oswald, 1980) suggests that its function is to restore the body, including the replenishment of neurotransmitters, and the repair of tissue cells and muscles. It suggests tha...
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Answered by Emily C. • Psychology tutor
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Find integers A and B, such that (5x +4)/((2-x)(1+3x)) = A/(2-x) + B/(1+3x)

Adding the fractions on the RHS of the equation in the usual way gives A/(2-x) + B/(1+3x) = (A(1+3X) +B(2-X))/((2-X)(1+3X)) = (5x +4)/((2-x)(1+3x)) This gives an expression for the original numerator in term...
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Answered by Lorne F. • Maths tutor
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