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A metal has free electrons, so when it is heated these electrons gain kinetic energy, meaning they move faster. As a result, these free electrons will collide with other electrons or ions, transferring en...

x²+x-6=y

Is the equation we will use to demonstrate how to factorise quadratics.

The first step involves using the basic shape of all quadratic f...

e^{(x^2+2)}=f(x)=y

Is the equation we will use to demonstrate correct use of the chain rule.

The equation at the core of the chain rule is:

...

Effective Nuclear Charge is the net positive nuclear charge experienced by a valence electron orbiting the positively charged nucleus in an atom. Effective nuclear charge is redcued by:

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A good personal statement depends on the subject you’re applying for, but here are a few tips:

1. Make sure that about most of the stateme...