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Linking back to the question is one of the most important parts of an essay - At A Level, it's what will push you up into the higher grade brackets. The easiest way to do this, is to literally copy out pa...

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 t...

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 RN...

We must find a common denominator between the fractions to be able to add them (the bottom numbers must be the same). A common denominator of 5 and 7 is 35. To get to 35 from 5 we multiplied by 7, therefo...

Label each of the sides using the angle BCA. Therefore, AC = Adjacent, BC = Hypotenuse and AB = Opposite. Use the anagram SohCahToa to identify the side that we have (BC) and the side we are looking for (...