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This is a great example of where physics and our gut feelings about physics don't match up. This is a very common conceptional difficulty students have and is often jumped on by examiners. The best way to...

So we have y = 0 and therefore x² - 6x - 16 =0 

This is then factorised to (x+2)(x-8) = 0 and therefore we have x = -2, x = -8

To find the gradient we need to find dy/dx

So...

Generally, the imperfect tense should be used for events which happened regularly in the past or which took place over a period of time. The perfect tense is used more for one off events. So for example, ...

The Advantages are: 

Leads to effective, strong and stable government

Provides a clear link between MPs and their constituents

Prevents a minority party holding an ex...

Receptors are a group of specialised cells that are used by the body to detect different stimuli (changes in the environment). Receptors are most common in sensory organs like the eyes, ears and the skin....