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A scalar quantity has magnitude only - for example distance.A vector has magnitude and direction - for example gravity (acceleration tow...

Diffusion is the movement of particles from a high concentration to a low concentration. This process does not require energy. An...

To solve these simulataneous equations we need to use substitution:If 2x + y = 13 then y = 13 - 2xTherefore 3x - y = 12 can be rewritten as 3x - (13 - 2x) = 12We can expa...

The best way to tackle this is to practice strictly with time before the exam. I understand your frustration with the time limit especially when you know a lot. Doing loads of essay plans is very impor...

If we first calculate 30% of £4 to work out how much the price of the book has been reduced by.10% of £4 is £0.40. We know 30% will be this value multiplied by 3. Therefore 30% of £4 is £1.20.Now that we ...