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When finding the turning points of a curve, how can I tell if it is a maximum, minimum or a point of inflection?

To find the turning points of a curve one must find the values of x which satisfy dy/dx = 0. To further determine what type of turning point this is you need to compute the second derivative with respect to ...
BS
Answered by Ben S. • Maths tutor
11420 Views

Explain how a nerve impulse causes the chambers of the heart to contract (6).

The heart's excitation is myogenic and therefore can be started without any transmission from the brain. The sino-atrial node is found behind the posterior wall of the left atrium and is where the action pot...
JS
Answered by Jeremy S. • Biology tutor
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How do catalysts speed up the rate of a reaction?

A catalyst increases the rate of the reaction because: They provide an alternative energy pathway that has a lower activation energy This means that more particles have the activation energy required for the...
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Answered by Vanessa O. • Chemistry tutor
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Study Figure 3 which shows a satellite image of an area of vegetation that has been affected by human activity. Describe and comment on the impact of the human activity shown. (7 marks)

The image is of what looks to be a quarry. In the left of the image there is a lake, possibly with waste materials from the quarry. There are roads leading away from the area on the right, presumably to carr...
CG
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“Everyone knows what good means” Discuss (meta ethics)

Meta-ethics is the branch of ethics that aims to determine the usefulness of ethical language. Cognitivists believe that ethical language is meaningful, thus implying that everyone should know what good is. ...
LS
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