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One of the most crucial functions of the heart is to act as a pump which distributes the blood around the body. The blood is first collected in the atria, and then pumped from atria to the ventricles. The...

When an action potential from a motor neurone stimulates a muscle cell, a number of things happen to cause sarcomeres (the smallest contracting unit of a muscle cell) to shorten and contract very rapidly....

There are two main features if an object is in SHM. The first is that it has a fixed maximum amplitude. That is to say, if the mean (halfway between the maximum values of oscillation (+ve and -ve)) displa...

This is an example of an essay question that could be asked (with slight variation) for a paper on British Politics. An approach to the question will need to be twofold - firstly the content needs to be a...

Sodium chloride is a giant ionic lattice consisting of alternating, adjacent positively charged sodium ions and negatively charged chloride ions in a regular arrangement of rows and columns. The ions are ...