Top answers

Why are metals good conductors of electricity?

Because metals contain a ‘sea’ of delocalised electrons that are free to move around the metallic lattice, carrying charge.
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Answered by Aoife M. • Chemistry tutor
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What is sovereignty?

Sovereignty is a concept that can be traced to the 1648 Peace of Westphalia, which put an end to the 100 year-religious European wars. The concept was designed to allow each nation in Europe to declare their...
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Answered by Finley W. • Politics tutor
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Solve the equation x^{2}-2x-15 = 0

The general format for an equation of this type is ax 2 +bx+c Firstly you should factor the equation. Since in the example given a=1 you know that there will be a single x term in each factor. So you have (x...
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Answered by Ella H. • Maths tutor
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How do the offspring formed from asexual and sexual reproduction differ? Make sure to describe both processes in your answer.

Asexual reproduction occurs when the offspring comes from a single parent. This results in offspring with the same genetic composition as the parent. Sexual reproduction occurs when a male gamete and a femal...
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Answered by Ella H. • Biology tutor
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Rationalise the denominator of 6/√3 and simplify your answer.

'Rationalise the denominator' means that we need to express the fraction in a way which does not have a surd on the bottom. A surd is a way of expressing an irrational number. For example √4 = 2 which is a r...
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Answered by Jessica M. • Maths tutor
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