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How can I up-level my literature essays?

One way of improving A-level literature essays is demonstrating a good knowledge of different tenses and moods. The correct use of the subjunctive mood is usually key to showing the examiner your extensive k...
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Answered by Megan R. • Spanish tutor
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How should I best approach writing an Oxbridge personal statement?

Writing an Oxbridge personal statement is difficult, as there is immense pressure to present yourself and your knowledge of your subject as best and in as sophisticated a way as you can. However, contrary to...
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Why is magnesium positioned in Group 2 of the periodic table?

All the elements within a group have the same number of electrons in their outermost shell. Magnesium is in group 2 because a magnesium atom has 2 electrons in its outer shell/outermost energy level. OR give...
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Answered by Jyothi D. • Chemistry tutor
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Describe the function of the enzymes DNA helicase and DNA polymerase.

DNA helicase unwinds DNA by breaking H bonds between DNA strands. DNA polymerase joins adjacent nucleotides by forming phosphodiester bonds between them.
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Answered by Susannah C. • Biology tutor
3583 Views

Differentiate z = e^(3y^2+5) with respect to y. (Hint: use chain rule.)

We can find dz/dy using chain rule dz/dy=dz/du x du/dy (1) by defining u=3y^2+5 (since the exponent of e is a function of y we call this function u) and rewrite z=e^u. Then, we find dz/du=e^u (2) and du/dy=6...
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Answered by Sophie H. • Maths tutor
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