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What is crude oil and how is petrol derived from it?

Crude oil is a mixture of hydrocarbons. The crude oil is evaporatedand its vapours condense at different temperatures in the fractionating column. As you go up the fractionating column, the hydrocarbons have...
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Answered by Tahir P. • Science tutor
4297 Views

How do I create a great introduction to an English Literature essay?

Introductions are your essay 'in a nutshell'. You want to briefly answer the question without going into too much detail. You should set up the structrue of your essay in the introduction, mention your point...
AC
5645 Views

Factorise and solve x^2 - 8x + 15 = 0

The question gives you a hint on how to go about this question - Factorise!! 1) Factorise the left hand side . Find the two numbers which will add to give -8 and multiply to give 15. In this case, -3 and -5....
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Answered by Kieran N. • Maths tutor
6169 Views

How do I analyse a source?

By exploring the following areas of the source, you can follow a general structure that can be applied to all source analysis. The depth of analysis depends on how much there is to say about a source, but in...
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Answered by Kieran N. • History tutor
4660 Views

What is the difference between a series circuit and a parallel circuit?

In a series circuit, the electrons passes through each component in order before returning to the cell. In a parallel circuit, there are different paths for the electrons to take so the current splits depend...
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Answered by Ewan H. • Physics tutor
14900 Views