Top answers

How should I go about analysing a primary source?

A source is a first-hand piece of evidence that historians can use to find out about the past. Examples include: eyewitness accounts, letters, diaries, photographs, cartoons, posters etc. It might be helpful...
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Answered by Bethany B. • History tutor
16708 Views

Explain how a mutation in DNA could cause a non functioning enzyme to be formed

A mutation could change the order of DNA bases which would alter the type of amino acid produced from a DNA triplet. Therefore, the enzyme, which is a protein, formed from these amino acids would be differen...
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Answered by Hannah W. • Biology tutor
10189 Views

Here is a right-angled triangle (base = 8cm and height = 9cm) and a rectangle (length = 16cm). The area of the rectangle is 6 times the area of the triangle. Work out the width of the rectangle.

Area of triangle is 0.5 x base x height. 0.5 x 8 x 9 = 36 Area of rectangle is 6 x 36 = 216 Area of rectangle is also 16 x width 16 x width = 216 (Divide both sides by 16) width = 216/16 = 13.5
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Answered by Harry W. • Maths tutor
13176 Views

How can I recognise a work from the 20th Century?

It can sometimes be difficult to distinguish between works of the Romantic period and those of the 20th Century. This is largely owing to the themes of intense emotion that characterise works of both periods...
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Answered by William M. • Music tutor
4311 Views

Imagine a probe in space. Argon gas can be fired from the probes fuel tanks to propel the probe. Discuss whether conservation of momentum applies and whether the speed of the probe increases.

With these long answer questions the examiners want to see both the quality of your English and your knowledge of the topic. Typically, this means using key words and phrases. The numbers in the brackets are...
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Answered by Aran M. • Physics tutor
2599 Views