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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 dif...

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 si...

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 beco...

Its important when writing an essay to always make sure your points are fully explained and evidenced. The best way to remember to do this is to use the PEEL system. PEEL stands for Point, Evidence, Exp...

The perfect and imperfect tenses in latin are both used to describe actions which take place in the past, but they are used to describe slightly different types of actions.
The perfect is used to d...