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How do I effectively revise for an essay question?

Remember here that there are two things that examiners like to see: knowledge and skill. Focus your revision separately on these two things and then bring them together to give a great answer. To revise know...
CR
Answered by Connie R. • History tutor
2853 Views

Describe the electrolysis of potassium iodide in water. Include the overall balanced chemical reaction and the electrode reactions

The overall reaction is 2I - (aq) +2H 2 O (l) --> I 2(aq) + H 2(g) + 2OH - (aq) , the anode reaction is 2I - (aq) --> I 2(aq)­­ + 2e - and the cathode reaction is 2H + (aq) + 2e - --> H 2(g) . In aq...
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Answered by Pete H. • Chemistry tutor
60968 Views

How do I work out if two lines are parallel?

The gradients of the two lines must be the same. The gradient is m in the equation: y=mx+c For example: L1: y = 3x – 2L2: 3y – 9x + 5 = 0 First rearrange L2 so it is in the same form as L1 to get:3y=9x-5Then...
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Answered by Alexandra B. • Maths tutor
3719 Views

What is inflation and how can we measure it?

Inflation is when prices increase we can measure it using CPI and PPI data (basket of goods model)
LB
Answered by Luqman B. • Economics tutor
2003 Views

What is the value of sin(theta), cos(theta), tan(theta) where theta = 0, 30, 45, 60, 90

sin(0) = 0 ; sin(30) = 1/2; sin(45) = 1/sqrt(2); sin(60) = sqrt(3)/2; sin(90) = 1cos(0) = 1; cos(30) = sqrt(3)/2; cos(45) = 1/sqrt(2); cos(60) = 1/2; cos(90) = 0 tan(0) = 0; tan(30) = 1/sqrt(3); tan(45) = 1;...
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Answered by Luqman B. • Maths tutor
6152 Views