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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
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Why did Kennedy and Johnson escalate the conflict in Vietnam?

There are 4 really good factors to talk about when thinking about why Johnson chose to escalate the conflict in Vietnam. 1. The most important factor is containing communism - making sure that communism didn...
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Answered by Alexander C. • History tutor
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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...
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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
6155 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
4628 Views