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A fluorescent light uses a lining to emit visible light, explain why this is necessary and how it works.

The vapour inside a fluorescent tube is excited and ionised by the electrode either end of the tubes. The excited electrons inside of the vapour are unstable and so decay into lower energy states. The differ...
MC
Answered by Monty C. • Physics tutor
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Solve 7x – 9 = 3x + 2

aim is to move all numbers to one side and all the x to one side. whatever you do to one side, you must do to the other side. For example I want to remove -9 on the left by adding +9 to left side but I need ...
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Answered by Shahswar Z. • Maths tutor
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Express (9x^2 + 43x + 8)/(3+x)(1-x)(2x+1) in partial fractions.

A/(3+x) + B/(1-x) + C/(2x+1) = (9x^2 + 43x + 8)/(3+x)(1-x)(2x+1)So... A(1-x)(2x+1) + B(3+x)(2x+1) + C(3+x)(1-x) = (9x^2 + 43x + 8)Insert x=1Equation becomes 12B = 60 so B = 5.Then insert x=-3Equation becomes...
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Answered by Abhik V. • Maths tutor
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How do I integrate context into my analysis to get extra marks?

The first step in using context in your exam essays is research. Search for statistics and facts relating to the author or the time period and geographical place the book was set and/or written in. Once you ...
SA
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What is a bond?

Atoms can be modelled as point positive charges with clouds of electrons around them. When two atoms come together close enough, a region of higher electron density forms between the two atoms. This means th...
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Answered by Rokas E. • Chemistry tutor
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