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What is a monopoly?

A monopoly is a market structure where there is one single dominant firm (opposite to perfect competition). Since they dominate the market they are able to set the price because there are no close substitute...
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Answered by Zuzanna S. • Economics tutor
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Describe the process of transcription

Transcription is the process where a segment of DNA is copied into a segment of mRNA. This takes place in the nucleus. First the segment of DNA needs to be unzipped, so an enzyme breaks the hydrogen bonds be...
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Answered by Calum L. • Biology tutor
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What is the escape velocity of an object leaving a planet mass M, radius R?

As the object leaves the surface of the planet, it loses kinetic energy and gains gravitational potential energy. Through conservation of energy we know the loss of kinetic energy must be equal to the gain o...
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Answered by Thomas R. • Physics tutor
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Express (4x)/((x^2) - 9) - (2)/(x + 3) as a single fraction in its simplest form (4 marks)

To do this we need to find a common denominator. We have an (x + 3) on the right hand side and a difference of two squares ((x^2)-9) on the left hand side. So factorising what looks more complicated is first...
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Answered by Luke N. • Maths tutor
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Explain why there may be tension between human rights and state sovereignty

Human rights are rights that people are entitled to by the virtue of being human. They are said to be indivisible, absolute, fundamental, and universal. These rights are either positive rights (usually ‘free...
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