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What is an action potential? When a stimulus of sufficient size is detected, it causes a temporary reversal of charges either side of the axon membrane. It also causes the channels in the axon memb...

Firstly, you need to understand that mass= moles x relative formula mass. Using this equation and the understanding of the periodic table, you can work out the relative atomic mass of carbon which is 12 a...

The personality cults of Mao Zedong and Adolf Hitler were highly important to controlling their respective states, as they established a level of informal, "soft" power throughout both their par...

We use the following double angle formulae cos(2x) = cos^2(x) - sin^2 (x) and sin(2x) = 2sin(x)cos(x) to see that 2(sin^2(x)- cos^2(x)) + 6 sin(x) cos(x) = -2-(sin^2(x)+ cos^2(x)) + 3*2 sin(x) cos(x) = -2...

The multiple choice section can be really difficult, and although this probably isn’t what you want to hear, it’s often just a case of trusting your gut. Don’t spend too long on the question- whichever on...