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x^2+2=18, find the value of x.

This is a basic rearranging of the equation that easily catches students out and will generally be offered 3 marks. The first thing to do is take the 2 on the other side of the equation so we get x^2=16. Fro...
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Answered by Ishaan P. • Maths tutor
3469 Views

What is the definition of an internal economies of scale?

This is when due to a single firm expanding in its size they benefit from lower average costs and thus allow them to to more efficiently reach their targets such as profit maximisation. This answer is two ma...
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Answered by Ishaan P. • Economics tutor
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Calculate how much charge flows through a circuit with 6.0A of current in seven minutes?

It is important to understand that Q=It and therefore by rearranging the equation we know that 1 amp means one coulomb of charge passing through a point every second in the circuit. Therefore we multiply our...
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Answered by Ishaan P. • Physics tutor
3439 Views

Explain the Carbon Cycle?

Carbon is removed from the air by plants during Photosynthesis as they need this to make energy. Oppositely, respiration takes in O2 and releases CO2 to the atmosphere. CO2 is also released in to the atmosph...
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Answered by Harkaram S. • Biology tutor
2663 Views

Metals have high melting points. Explain, in terms of their structure and bonding, why metals have high melting points

How I would explain this to a student:"It is important to first know what the total marks for each answer is. 2 marks means the examiner requires 2 points. The question also states explain in terms of s...
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Answered by Esther A. • Chemistry tutor
7214 Views