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What is the best way to go about answering a long answer biology question?

Answering questions in biology that offer more marks is all about key words - usually the examiner has a few of these in front of them that offer a mark simply for using the word in your answer. The good thi...
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Answered by Daisy Y. • Biology tutor
7552 Views

Integrate sinx*ln(cosx) with respect to x.

1. ʃ sinx*ln(cosx) dx First notice the composition ln(cosx). To make the expression easier to integrate we try substitution (substitution is often useful when trying to integrate expressions that are or incl...
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Answered by Darshan S. • Maths tutor
19231 Views

What are isotopes and how do they differ from each other?

An isotope is a different form of the same element. They differ from each other by the number of neutrons, however they have the same number of protons and electrons. This results in a different atomic mass....
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Answered by Hayden T. • Chemistry tutor
41393 Views

Calculate the percentage, by mass, of carbon in sodium hydrogencarbonate (NaHCO3)

When faced with this style of problem there are steps to correctly answer the quesion: Step 1 - identify the atomic mass of carbon Step 2 - calculate the atomic mass of the compound Step 3 - work out the per...
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Answered by Hayden T. • Chemistry tutor
43783 Views

How can we remember the difference between differentiation and integration?

Integration is the inverse of differentiation. I.e. for differentiation of linear expressions we multiply the coeifficient with the power of the unknown and then subract 1 from the power. Integration is the ...
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Answered by Madeha N. • Maths tutor
5328 Views