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The fundamental unit of electricity is 'charge'. Each electron is slightly negatively charged and it is this movement of charge around a circuit which powers our appliances. The speed of the electrons/the...

1. Write out the equation when Magnesium is burned to produce Magnesium oxide: 2Mg + O2 > 2MgOMagnesium to Magnesium oxide is 1:12) Work out the number of moles present in 15g of Magnesium: Moles = ...

Simultaneous equations have two or more unknown values, in this case there are two: x and y. To solve them, first we need to get one unknown by itself. In order to do this we need the coefficient of eithe...

Consumption - a reduction in interest rates means that the cost of borrowing money for consumers is lower. This means that consumers demand more money in order to consume. Large purchases become relativel...

Language is not a stable category. We are used to noting the differences between speakers of different languages, but the differences within a single language can be just as significant over a period of t...