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A: When we exercise the tissues of our body have an increased requirement for oxygen. The body facilitates this by increasing the respiratory and heart rate, thereby increasing the rate of gas exchange in...

It's really easy to do in history; you have so much to say and so little time in which to say it. Organisation is key here, both in your revision and your exam method. It is worth identifying the key even...

Before analysing a text, it's always a good idea to look at the contextual information that you have been given and come up with some theories which are likely to be relevant (e.g. if it's a transcript, G...

Tackle differentiation questions in two parts: First put it into the simplest for possible for differenciation, then perform the differenciation. 

So for this equation you should first expand the t...

1. Identify the limiting reagent: you have been told sodium hydroxide is in excess, so you know sulfuric acid is the limiting reagent

2. Calculate the moles of the limiting reagent: ...