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Explain the role of the diaphragm when breathing in and out

The diaphragm is a large muscle located at the base of the lungs. It is naturally dome shaped when relaxed. When we need to inhale, the diaphragm will contract and flatten out. This increases the volume of t...
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Answered by Salko K. • Biology tutor
6704 Views

How do you form phenylamine from benzene? Include reagents and conditions and the name of the reactions

Benzene to nitrobenzene / nitration of benzene. Conditions: concentrated nitric acid and concentrated sulfuric acid. Carried below 50 o C to avoid further substitution of nitro groups Nitrobenzene to phenyla...
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Answered by Denzell O. • Chemistry tutor
11739 Views

How do I improve my exam technique?

A common question asked by a lot of students at all levels! You must remember to always refer back to the mark scheme for the exam that you will be taking. When looking at past papers, always have a copy of ...
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Answered by Ryan H. • Politics tutor
2797 Views

Rationalise the denominator of \frac{6}{\sqrt{2}}.

When rationalising, multiply the fraction by the denominator - so what that means is multiply the fraction by the square rooted number over the square rooted number. The numerators then multiply to give 6 mu...
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Answered by Akash R. • Maths tutor
6392 Views

What is the „Plusquamperfekt, how do you use it and how can you tell it apart from the „Perfekt“?

Both the “Plusquamperfekt” and the “Perfekt” are past tense, each of them describing a different level of the past – highlighting the relationship between several actions in the past. The “Perfekt” is the co...
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Answered by Thomas S. • German tutor
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