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Olbers' Paradox is a famous problem which baffled many scientists in the early 19th century. 

The German astronomer Olbers (and many of his colleagues) made assumptions that the universe ...

Capacitors are an electrical component made up of two plates with an insulator between them.

Electrons flow onto one of these plates as current flows around the circuit. This gives one of...

Both Comparative and analystic source questions are difficult to approach if you have not been taught exactly how the exam boards like them answered.In my experience, there is a relatively simple process ...

While structuring a History essay will depend somewhat on the type of question being asked ('to what extent,' 'why' and 'how' questions differ), there is certainly a general outline that I would favour...

First, you have to work out whether the side you need to find is the hypotenuse or not. The hypotenuse is the longest side of the triangle, opposite the right angle. For this question, you use Pythagoras'...