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Why do you want to read Geography at Cambridge?

Why Geography: the answer to this I think is the most important answer that will give the interviewers either a good or a bad impression of you. Most of the questions after this, will be shaped heavily on th...
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2187 Views

What is the difference between 'passé composé' and 'imparfait' ?

First and foremost, the tenses in French can never be translated literally from English! Whether the phrase 'I was walking' is translated into PC or imparfait is determined by the context of the phrase in th...
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Answered by Maria D. • French tutor
2981 Views

What is the role of the Loop of Henle in urine production?

The Loop of Henle is a 'U' shaped portion of the nephron tubule which is very important in retaining water and Na+ from urine, in the process of 'Osmoregulation'. Water leaves the descending limb of the Loop...
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Answered by Ursula A. • Biology tutor
21088 Views

Use the double angle formulae and the identity cos(A+B)≡cos(A)cos(B)−sin(A)sin(B) to obtain an expression for cos 3x in terms of cos x only

To answer, you need to know and be able to use your trigonometric formulae including the double angle formulae on data sheet. 1: cos(3x)=cos(2x+x) = cos(2x)cos(x) - sin(2x)sin(x) split the 3x into two terms,...
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Answered by Sam H. • Maths tutor
19056 Views

Explain why increasing the temperature of a reaction increases the rate of the reaction (2)

By raising the temperature of the reaction mixture, the particles have more (kinetic) energy and so move around at a greater rate. This means there are more frequent collisions, due to the increased speed th...
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Answered by Sam H. • Chemistry tutor
3386 Views