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A sphere has a surface area of 4m^2, radius r. Another sphere has radius 2r. Calculate the Volume of the second sphere in M^3.

The surface area of a sphere can be calculated using Area = 4 x Pi x r^2. Since we know the surface are of the first sphere is 4m^2, we can write: 4 = 4 x Pi x r^2. This simplifies to r^2 = 0.318. Taking the...
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Answered by Freddie W. • Maths tutor
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Describe a biochemical test that could be used to determine the presence of triglycerides in a sample of food.

Dissolve the sample in ethanol and then add water. The presence of triglycerides is confirmed by a white emulsion forming.
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Answered by Hannan N. • Biology tutor
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Why is genetic diversity decreased when populations are split off from one another?

This question is all about genetic diversity and more specifically how difference in alleles is what creates diversity within a population of a species. (here I would ask about whether the student understand...
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Answered by Ben J. • Biology tutor
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What is the effect of an indirect tax on the cigarette market?

Cigarettes are considered a demerit good since its consumption has a negative impact on the consumer. The product then results in an external cost as it becomes a cost for a third party as a result of an eco...
Answered by • Economics tutor
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Describe how selective breeding could be used to improve the quality of milk produced by cows (4 marks)

Farmers could keep information on their cows such as the milk yield of a bull's mother and daughters in order to select ideal bulls as male parents. These bulls would then be allowed to mate with (unrelated)...
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Answered by Adam T. • Biology tutor
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