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In a fish and chips shop, the potatoes are cut hours before they are cooked, but they must not dry out. To stop this, the owner soaks them in a salt solution. Define the process of osmosis and explain what would happen if you used distilled water.

Osmosis can be described as the movement of water from a high concentration to a low concentration through a semi permeable membrane.In this example the salt solution has roughly the same concentration of wa...
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Answered by Vikram S. • Biology tutor
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Differentiate the function y=4sqrt(x)

Can re-write function as y=4x 1/2 Then follow the standard steps for differentiating a power. Take the 1/2 down and multiply by the number in front of the x, in this case 4, to give 2. Now reduce the power w...
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Answered by Calum W. • Maths tutor
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In ‘Of Mice and Men’, how does Steinbeck present women?

Steinbeck presents women very negatively within his novella ‘Of Mice and Men’ through his usage of his only female protagonist, Curly’s wife. She isn’t even given a name and the only title she has indicates ...
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A cuboid has dimensions: width = x+1, length = 2x-2, height = x+2. Work out the volume of this cuboid. Give your answer in terms of x.

Volume of cuboid = width x length x heightV = (x + 1)(2x - 2)(x + 2) For simplicity, multiply the first 2 sets of brackets first. Then multiply the result by the third set of brackets.Note: for multiplicatio...
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Answered by Sam A. • Maths tutor
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2017 Edexcel Summer 2017 Q18) 16^1/5 × 2^x = 8^3/4 Work out the exact value of x

As this is a calculator paper, it is acceptable to use one. The first step to calculating the exact value of x is to make it the subject of the equation (i.e. moving it to its own side)2^x = (8^3/4)/(16^1/5)...
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Answered by Rory P. • Maths tutor
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