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what is a catalyst

A substance that increases the rate of a reaction without having been used up itself in the reaction. They function by providing a lower activation energy for the reaction to begin, which is a type of thresh...
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Answered by Samuel C. • Chemistry tutor
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What is the difference between glucose and glycogen?

Glucose is a monosaccharide, meaning that it is composed of single units. This is suitable for transport through the blood stream. Glycogen, however is a polysaccharide meaning that is composed of at least m...
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Answered by Samuel C. • Biology tutor
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Assess to what extent China can claim to be a superpower

China is a BRIC, or emerging, country and is challenging the USA for superpower status1) Economically low cost labour - cheap manufacturing costs - can outpace US companieslarge volume of exports - US relies...
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Answered by Rebecca S. • Geography tutor
10456 Views

How can I recognise when to use a particular method for finding an integral?

Often the question will ask you to use a particular method to integrate something, but sometimes they will not and you will have to recognise for yourself the best way to do it. There is often more than one ...
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Answered by Lloyd C. • Maths tutor
4310 Views

What do I need to do for full marks on the question "describe an everyday circumstance where resonance occurs (4 marks)"?

It's important to look at the number of marks awarded for an answer, this can help you structure your answer and think about what will be on the marking scheme. Here a simple statement of an application of r...
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Answered by Lloyd C. • Physics tutor
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