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Rearrange, 5(a + b)= 2ab , to make 'a' the subject

The question is asking for 'a' to be the subject and therefore our aim is to result in an answer with the form 'a='. The first step is to expand the brackets on the left hand side by multiplying 'a' by 5 and...
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Answered by Meera M. • Maths tutor
11358 Views

Deduce which of Na+ and Mg2+ is the smaller ion. Explain your answer.

mg2+ would be the smaller ion this is because each ion has the same number of electrons however mg2+ has a greater number of protons and therefore is more charge dense and the outer electrons feel a greater ...
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Answered by Michael C. • Chemistry tutor
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How do I know if I am using the right particular integral when solving a differential equation

Particular integrals will generally be derived in two different ways, depending on the type of the differential equation that you are solving. For example if it was a linear first order ODE, then you would h...
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Answered by Vaikkun V. • Maths tutor
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Two snails belong to the same species. Yellow shelled snails found in grassland areas, dark shelled ones in woodland. Shell colour determined by genes. Explain how natural selection could have caused this distribution of snails

The yellow banded shell provides camouflage to the snail in grassland areas. These are more difficult for the birds to see, so less are eaten by predation. As a consequence, more yellow banded snails survive...
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Answered by Leah B. • Biology tutor
5069 Views

What is a Cosmological Argument for the Existence of God?

Generally speaking, we can think of arguments for the existence of God as falling under two main categories: cosmological and teleological (sometimes also called fine-tuning). Both sorts of argument appear a...
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Answered by Celia C. • Philosophy tutor
5362 Views