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A Level

How do you simplify something of the form Acos(x) + Bsin(x) ?

This sort of question is quite common, and a little bit complicated, so the explanation is quite long! But it's a great one to understand. There are a few tricks you need to know to be able to do...

JM
Answered by Jack M. Maths tutor
15022 Views

What is a buffer, and how does it respond to the addition of acid or alkali?

Firstly, I would try and establish with the tutee what a buffer is and define it. Going through the key aspects of what a buffer is. The standard definition I have for a buffer is 'A solution that minimis...

TW
Answered by Tom W. Chemistry tutor
3021 Views

When should you use the subjunctive in French?

The subjunctive should be used in French  after verbs expressing:

  1. wish or desire e.g. désirer que, souhaiter que, vouloir que

  2. necessity, orders, advice, eg. falloir que,...

EH
Answered by Emily H. French tutor
2063 Views

What is the Rutherford scattering experiment and what did it tell us about the nature of the atom?

The experiment involves firing alpha particles, positively charged helium nuclei made of two protons and two neutrons, at a thin layer of gold foil. There is a screen behind the gold foil which is used as...

TD
40541 Views

How can the idea of precondtioning as part of 'Thinking Ahead' benefit a programmer when writing code?

'Thinking Ahead' is one of 5 main aspects of Computational Thinking. It is the planning of inputs, ouputs and preconditions that the program will adhear to. By 'Thinking Ahead' programmers can discover ho...

NH
Answered by Nathan H. Computing tutor
10160 Views

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