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Planning in an exam is really important to ensure you have a structure of argument to refer back to. Due to the limited time available, your planning should be quick and to the point. A good way of doing ...

You will need to multiply the mass of each isotope (the same atom with a different mass number) by the percentage abundance of that isotope. Then, add all these values together and divide by 100. This wil...

This tests the students knowledge of differentiation rules as well as algebraic manipulation. Namely the product rule and implicit differentiation. Differentiate term by term and then isolate dy/dx using ...

State de Moivre's theorem. Use n =5 and solve. I'll show this on the whiteboard.

In German, capital letters are only used for nouns and names and after full stops. You can recognize nouns by spotting articles in front of them (e.g der, die, das / ein, eine). It is important to rememb...