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The figure shows a sketch map showing part of a coastline where deposition is the main coastal process. Suggest how the coastline shown may change in the future.

The beach in figure 1, in the future, is likely to extend in a eastward direction extending off of the headland. I know this because the prevailing wind direction is in a south westerly direction which cause...
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Answered by Rosie H. • Geography tutor
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Solve this pair of simultaneous equations: 3x + 2y = 4 and 2x + y = 3

2x + y = 3 therefore y = 3 - 2x Substitute y = 3 - 2x in to the first equation: 3x + 2(3 - 2x) = 4 3x + 6 - 4x = 4 -x = -2 therefore x = 2 Substitute x = 2 in to either equation: 2(2) + y = 3 4 + y = 3 y = -1
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Answered by Tim C. • Maths tutor
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A solution of ethanoic acid in water has a concentration of 3 g/dm^3. Given that the pKa of ethanoic acid is 4.76, calculate the pH of this solution.

Key facts to be noted by student: Molar mass of ethanoic acid = 60 g/mol. pK a = -log(K a ) pH =-log([H + ]) Concentration of acid solution = 3/60 = 0.05 moldm - 3 k a = [H + ] 2 / [CH 3 COOH] therefore [H +...
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Answered by Tim C. • Chemistry tutor
7378 Views

mRNA is used in translation to make polypeptides. Describe the process of how mRNA (Messenger RNA) is produced in the Nucleus.

Helicase unwinds the DNA double helix strucutre This is done by breaking the hydrogen bonds Only one strand is then used as a template RNA nucleotides bond/ attract to exposed bases This is according with co...
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Answered by Sophia B. • Biology tutor
4019 Views

Solve x² - 3x - 2 = 0

To complete the square for the equation ax² + bx + c = 0 there are three steps.. 1. In order to complete the square, we need to take the first two parts of the quadtratic equation, and put them in the form o...
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Answered by Natalia M. • Maths tutor
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