Search over 10,000 free study notes

This is an example of differentiation. This can be useful in many concepts, one being finding the gradient of a line or curve at a certain point. To differentiate these types of equations, the rule is to mul...

This question is about rearranging the equation so that we have all the unknown values on one side, and all the known values on the other side.To start, we want to put all the x values on one side, and all t...

A reflex arc describes what controls a reflex reaction in humans. When something happens to an organism that needs a quick response a reflex action occurs. It allows the action to be 'unthinking'. A stimuli ...

Here you need to use two formulae; one for the surface area of a sphere (4πr 2 ) and one for the area of a circle (πr 2 ). First the surface area of the 6cm radius sphere: Area=4π(6 2 )=144π Second the area ...

Here you need to use the quadratic formula, it cannot be solved by expanding out the brackets. In the formulae for which can be found on the formulae sheet. In this case a=5, b=8 and c=2. This gives: x=(-8±√...