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Both gravitational and electric field obey inverse square laws (e.g. F(grav)=GMm/r^2 and F(electric)=kq1q2/r^2 where GMm and kq1q2 are constants). They both act between two bodies without any means of con...

Neurons use a sodium potassium pump to maintain a resting potential in the body. Inside a cell normally, there are more sodium in the cell and fewer potassium outside the cell, and hence there is a negati...

Firstly, a quick overview of rationalising the denominator. For this, we want to make sure that the bottom half of the fraction (the denominator) is rationalised (and so doesn't contain any surds any more...

The empirical formula of a compound is the simplest ratio of the atoms present in that compound and it can be calculated relatively easily by following a few simple steps:Let's use an example of a hydroca...

Firstly, the enzyme DNA Helicase breaks the hydrogen bonds present between base pairs. This allows the DNA double helix to unravel, exposing the DNA bases. Free DNA nucleotides then bond to the exposed ba...