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The Ultimate Guide to Accents in Spanish

Because we do not use them in English spelling, using accents (or as we call them in Spanish- acentos or tildes depending on where you're from) can seem quite daunting at first. The following is a guide on h...
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Answered by Celia C. • Spanish tutor
21010 Views

Why does the equation for gravitational potential energy give a negative value if energy cannot be negative.

The equation is shown below as found in the IB Physcis Data Booklet. GPE = -G M m / r Where GPE is gravitational potential energy, G is the gravitational constant, M and m are the masses of the objects, and ...
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Answered by William L. • Physics tutor
6190 Views

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
11316 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
51440 Views

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
11880 Views