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How would you answer the following exam question: Why were there disagreements at the Potsdam Conference in 1945? Explain your answer (6 marks- OCR, 2015)

The mark scheme requires that you provide a 'multi-causal response' for you to score full marks. This should mean that you provide two or three reasons why there were disagreements. Also, make sure that it a...
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Answered by Luis F. • History tutor
5974 Views

I’m confused by the difference between using f’(x) and f”(x) to find the minima and maxima of a curve

Imagine you have an object moving through time, like a car on the road. The distance that car travels=xThe speed of that object=f’(x)This is because speed is defined as the the rate of change of distance (sp...
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Answered by Xorsheed Z. • Maths tutor
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Write a balanced equation for the oxidation of Iron from the 2+ oxidation state to the 3+ oxidation state using the manganate ion.

Firstly, we need to write a balanced equation for the oxidation of Fe 2+ to Fe 3+ . We know that when something is oxidised, it is losing electrons, making the half equation: Fe 2+ ---> Fe 3+ + e - (we ca...
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Answered by Paige M. • Chemistry tutor
22157 Views

How does natural selection occur?

There are two important terms to understand (and state in an exam!) to answer this question. 1) Genetic diversity = the number of different alleles of genes in a population . Genetic diversity is a main fact...
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Answered by Tess W. • Biology tutor
5649 Views

Why do insects and other animals need developed transport systems?

They have a high metabolic rate As a result, they have a high oxygen and glucose demand Diffusion is not efficient alone as it is too far
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Answered by Freya B. • Biology tutor
4879 Views