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Si clauses are used to introduce a hypothetical action that decides another action.
The tense used in the hypothetical situation decides the tense that follows.
Pre...
A way of remembering the difference is to think that the word 'perfect' comes from the Latin 'perfectus' meaning 'completed' while 'imperfect' will therefore mean not yet compl...
In Physics, there are two types of numbers: scalars and vectors. Scalars are just a normal number, as we are used to. Vectors also have a direction associated with them. Thus, variables like temperatur...
Differentiation is defined as the rate of change of a function. Imagine we had a function f(x), which we shall let equal x2. We all know what the graph of x2 looks like.
Emotions and behaviours are products of the anatomy and physiology of the nervous and endocrine systems
Animal research may inform our understanding of human behaviour
Pat...
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