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What is the circle of fifths?

The Circle of Fifths is a harmonic system which uses the interval of a 5th, i.e. C to G to help us identify keys and other important musical factors. The Circle of Fifths can be laid out in many ways but thi...
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Answered by Elan R. • Music tutor
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Solve the simultaneous equations 2x - y = 13, x - 2y = 11

In order to solve simultaneous equations, you need to make either terms of x (i.e. '2x') or terms of y (i.e. 'y') in equation (1) and equation (2) equal. To do this, multiply either (1) or (2) as shown below...
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Answered by Graciella M. • Maths tutor
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How to write an essay on: The importance of proteins in the control of processes and responses in organisms.

Explain the use of proteins as enzymatic catalyats - including examples. Enyzmes control metabolic pathways - such as in the Krebs cycle. Proteins/enzymes in photosynthesis - with examples. Control of moveme...
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Answered by Eva B. • Biology tutor
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What is the second law of thermodynamics?

Formally speaking, the definition required in an exam would be that the second law of thermodynamics states that the entropy of an isolated system never decreases. The second law was conceived with the conce...
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Answered by Lucas B. • Physics tutor
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FInd the values of x for the following equation holds: x^2-5x+6=0

Factorise (x-3)(x-2) =0 Therefore x-3=0, x=3. Also x-2=0, x=2.
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Answered by Nelson T. • Maths tutor
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