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I always prioritise having a really bulletproof, strong structure - especially in the time constraints of a exam. I like to come up with my subtitles before I start writing, both to make sure I cover all ...

The voltage (or potential difference) between two points is the cost in energy to move a unit of positive charge from the point of lower potential to the point of higher potentia...

First, let's start by labelling the equations. We can call x²+2y=9 equation 1 and y=x+3 equation 2. Rearrange equation 2 to give us x = y-3. We can then substitute this back into equation 1. So...

Factors affecting Supply:-Exchange Rates if it is an international business-Price of commodity-Government policies, e.g. taxation
Factors affecting Demand:-Consumer taste-Consumer income-Changes in p...

-Increase the concentration (pressure in gases). (1) This increases the likelihood and frequency of collision because the particles of reactant will be closer together (1)-Increase the temperature(1). Thi...