Top answers

How do I expand double brackets?

Use the moon method. E.g. (x+1)(x+2) multiply x with x multiply x with 2 mutiply 1 with x multiply 1 with 2 If you draw this out it will look like a moon shape. now put the like terms together
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Answered by Sulayman H. • Maths tutor
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A body of mass 2kg is travelling in a straight line along the x-axis. It collides with a second body of mass 3kg which is moving at -2m/s. The two bodies move off together at 3m/s. What is the initial velocity of the first body?

2u-3 2=5 3=15, 2u=15+6. Therefore, u=10.5m/s. This is a standard type of question, it is simply about conservation of momentum. Momentum (p) is equal to mass velocity. Initially, the first body has momentum ...
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Answered by Caroline L. • Physics tutor
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Why is ethylamine a stronger base than phenylamine?

A base is a proton acceptor. Amines work as bases due to the electronegativity of the nitrogen atom. The lone pair in the nitrogen atom is filled in a 2p(z) orbital, in phenylamine, the p orbital sufficientl...
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Answered by Adhib M. • Chemistry tutor
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'Charles I's intransigence was the ultimate cause of the regicide'. Assess the validity of this view.

To answer this question, it is important to consider three different points of view - that which agrees, that which disagrees and that which offers an alternative perspective. It would be ideal to offer at l...
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Answered by Miriam D. • History tutor
4280 Views

How do I structure my personal statement?

When writing your personal statement it is important to be concise and keep everything as relevant as possible. Begin by demonstrating your interest in the subject you are applying for and why you are intere...
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