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Which techniques should we use when we have to deal with a written historical source?

The written sources are the main historical source that historian use in their research. However the answers they provide will very much depend on the sorts of questions historians are asking. Before we star...
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Answered by Athina A. • History tutor
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What is the difference between breathing and respiration?

This was a question I was commonly asked when assisting GCSE science students in year 9/10. Breathing is simply taking air in through your nose/ mouth and down into lungs (and then breathing it out again). -...
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There are n sweets in a bag. 6 of the sweets are orange. The rest of the sweets are yellow. Hannah takes a sweet from the bag and eats it. Hannah then takes at another sweet. The probability that Hannah eats two orange sweets is 1/3. Show that n²-n-90=0

P(2 orange sweets) = P(orange sweet) * P(orange sweet) (6/n) * (5/(n-1)) = 1/3 30/(n(n-1)) = 1/3 90 = n(n-1) 90 = n 2 -n n 2 -n-90=0 as required
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Answered by Tim V. • Maths tutor
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Evaluate policies which a UK government could use to control the activities of oligopolists. (25 marks)

An oligopolistic market is one where mutliple firms coexist in order to provide similar goods or services. The firm’s in this market are however, price makers despite similarities in the products. This allow...
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Answered by Tim V. • Economics tutor
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What is alternative splicing

Splicing is a process where premRNA is transformed into mRNA. It involves the removal of Introns ( gene sequences which do not code for proteins ) and the attachment of exons (sequences which code for protei...
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Answered by Petros A. • Biology tutor
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