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Why is (-1)*(-1)=1?

Even though this question seems trivial to most people with some mathematical expertise, it actually cuts quite deep into an intuitive understanding of what multiplication truly is. When one writes an expres...
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Answered by Rudolfs T. Maths tutor
4352 Views

How do I approach an OCR fifty-mark essay?

There is a standard answer framework that you should stick to to boost your marks. For an illustration, let's consider a question that came up in 2013 in crime and deviance module - outline and assess Intera...
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Answered by Julia L. Sociology tutor
3485 Views

Describe the structure of proteins

Proteins are polymers of amino acids, formed by long chains of amino acids joined together by peptide bonds. These bonds are formed by condensation reactions which allow two single amino acid molecules to jo...
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Answered by Jena H. Biology tutor
65045 Views

Why the Newton's second law of motion important?

Newton's Second Law of Motion F=ma is very important because it shows the relationship between forces and motion. It allows you to calculate the acceleration (and therefore velocity and position) of an objec...
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Answered by Saeed G. Physics tutor
52277 Views

I don't understand the Subjunctive tense

Try to think of the subjunctive as a feeling/mood/sentiment instead. A tense is an action whereas the subjunctive is a feeling... it is also used to express doubt/uncertainty whereas other tenses are facts. ...
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Answered by Joe F. Spanish tutor
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