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Use a clean platinum wire loop. To clean the loop, dip in dilute HCl and hold in flame until the flame burns without any colour. Then dip clean loop into samples. Li+ turns the flame red, Na+ yellow\orang...

-To start the sinoatrial node (SAN) on the wall of the right atrium sends an electrical signal across the right and left atria to contract and the blood moves into the ventricles. A layer of non-conductiv...

Rearrange one of the equations to get x equals an equation in terms of y.3x+2y=4Take 2y away from both sides3x=4-2yDivide both sides by 3x=(4-2y)/3Substitute this into the other equation in place of x4((4...

First, you must remember that one of the main purposes of Oxbridge interviews, aside from seeing whether you would cope with the academic standard, is as an opportunity for the tutor to assess your charac...

Using rules of logarithms: 3log(x^2)+4log(y^3)=log((x^2)^3)+log((y^3)^4) =log(x^6)+log(y^12) =log((x^6)(y^12)