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This is an example of an energy consideration problem involving work done in the context of a Hooke's law situation. Firstly draw a diagram to show what's going on. Then recall that the <...

Integration by parts follows the general form: ∫u (dv/dx) = u.v - ∫v (du/dx)Let x = uLet sin 7x = (dv/dx)∫x.sin(7x) dx = x.(-1/7)cos(7x) - ∫(-1/7)cos(7x).1 dx = (-x/7)cos(7x) + (1/49)sin(7x) + c

X-ray diffraction shows all carbon-carbon bonds in benzene are the same length (140 pm), between the lengths of a single (147 pm) and double bond (135 pm). This suggests that Kekule's alternating single a...

Practice suing those tenses in speech and writing when you can. If you get it wrong, don't worry! As long as you keep practising using those tenses, you'll be confident in using and manipulating those ten...

A haploid cell contains half the number of chromosome, for example a haploid human cell would have 23 chromosomes as opposed to 46. These haploid cells will be the sperm or egg cell (the gametes) A diploi...