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How can I evaluate a source?

When confronted with an historical source, there are a few easy steps you can take to immediately assess how reliable it is. First of all, you need to decide whether the source is primary or secondary. A pri...
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Answered by Ruby R. • History tutor
12687 Views

The gradient of a curve is defined as Dy/dx = 3x^2 + 3x and it passes through the point (0,0), what is the equation of the curve

Integrate this = (3x^3)/3 + (3x^2)/2 + c So y = x^3 + (3x^2)/2 + c Using point (0,0), 0 = 0 + 0 + c so c = 0. Full equation of the curve is therefore x^3 + (3x^2)/2
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Answered by Laura T. • Maths tutor
6464 Views

Simplify fully: (5 +√7)/ (2+√7)

Can show working on a whiteboard.
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Answered by Tony A. • Maths tutor
6659 Views

Describe how the RER is involved in the production of enzymes. [2 marks] June 2014

To attain the two marks you have to say that the RER contains ribosomes and these synthesis proteins. Enzymes are specialised proteins.
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Answered by Tony A. • Biology tutor
20567 Views

A naturally occurring sample of the element boron has a relative atomic mass of 10.8 In this sample, boron exists as two isotopes. Calculate the percentage abundance of 10B in this naturally occurring sample of boron.

The answer is 20%. This is a failry common question and stomps many students. The easiest way to answer this question, in my opinion, is to see that this question is asking you to figure out the ratio of iso...
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Answered by Tony A. • Chemistry tutor
40599 Views