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How do electrical impulses control the regular beating of the heart?

The electrical beating of the heart is controlled by the cardiovascular control centre located within the medulla oblongata within the brain. Heart rate is controlled by the frequency of impulses being sent ...
WG
Answered by William G. • Biology tutor
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what is the difference between proactive and retroactive interference?

Retroactive interference and proactive interference refers to different types of contamination memory. It affects occurs in our LTM when 2 pieces of information conflict not allowing us access to memories de...
EF
Answered by Edward F. • Psychology tutor
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How to ensure your Essay makes sense under timed conditions.

Firstly, Keep it simple . This might seem counter-intuative, surely you want to wow the marker with your mastery of the finer points of the english language? The fact is though if the examiner can't understa...
AV
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Prove n^3 - n is a multiple of 3

To prove n 3 -n is a multiple of 3 we rely on a few simple tricks. The first is to factorise the expression.n 3 -n = n(n 2 -1)n(n 2 -1) = (n-1)(n)(n+1)The next trick is to realise that the series of numbers ...
IH
Answered by Isaac H. • Maths tutor
16267 Views

differentiate the following equation: y = x^2 + 2x

Now remember that for differentiating polynomials the power is times by the coefficient and the power is reduced by one. This would mean that the answer now becomes: 2x + 2
SS
Answered by Syed saud H. • Maths tutor
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