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Assuming the Earth is a perfect sphere of radius R. By how much would your mass (m), as given by a scale, change if you measured it on the north pole and on the equator?

The key observation here is that the Earth is spinning (angular velocity w) and so are you. The scale will give one number or another depending on the force that you exert on it, and by Newton's 3rd Law that...
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Answered by Javier P. • Physics tutor
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Describe the differences between DNA and RNA. (3 marks)

Any 3 from:DNA is double stranded, whereas RNA is single strandedDNA consists of Deoxyribose sugar, whereas RNA is made from Ribose sugarThymine can be found in DNA, whereas it is replaced by Uracil in RNADN...
Answered by • Biology tutor
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Why should decisions made by courts yesterday be binding on courts when they make decisions today?

This a question about the procedural elements of law, questioning precedent. First, aim to tackle the assumptions within the question and whether you agree with them. Assumption number 1: That decisions on c...
Answered by • Law tutor
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Find the coordinates of the stationary point of y = x^2 + x - 2

At a stationary point, the gradient/slope of the graph is 0. To find the gradient of y, we differentiate with respect to x.This gives us dy/dx = 2x + 1. Since we want to find where the gradient is 0, we set ...
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Answered by Martin C. • Maths tutor
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Describe the process in which DNA replication occurs (6 marks)

Firstly, the enzyme DNA helicase separates the two strands in DNA by breaking the hydrogen bonds between them. Both of the two strands then act as templates to which free nucleotides attach to. This attachme...
Answered by • Biology tutor
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