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With reference to this extract, explain what J.S Mill means by happiness.

In “Utilitarianism” Mill argued that happiness was the sole basis of morality. Through observation of other men and women he found that all people have a natural tendency to seek happiness and therefore conc...
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Answered by George T. • Philosophy tutor
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At 25 °C, the initial rate of reaction is 3.1 × 10−3 mol dm−3 s−1 when the initial concentration of C is 0.48 mol dm−3 and the initial concentration of D is 0.23 mol dm−3 . Calculate a value for the rate constant at this T when rate = k [C][D].

The rate equation is given. So the first step is rearranging it to make the rate constant k the subject of the equation, by dividing both sides by [C][D]. k = (rate/[C][D]) now plug in the values given in th...
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Answered by Krystof C. • Chemistry tutor
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Explain what is meant by temporal and spatial summation in the context of synapses.

Context : We often think of a linear model of one pre-synaptic neurone linking up with one post-synaptic neurone. In reality, the nervous system is a large network, many pre-synaptic neurones may terminate a...
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Answered by Bethany K. • Biology tutor
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Asses why More Economically Developed Countries (MEDCs) dominate global trade

In the answer, you need to include examples spanning - historical, physical, economic, social or political reasons that explain how MEDCs dominate global trade despite the rise of new economies as well as gl...
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Answered by Hannah W. • Geography tutor
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This is a question on the photoelectric effect: For potassium, the work function is 3.65E-19J. Find the maximum wavelength of light that will cause photoelectrons to be emitted when shone onto potassium.

We know thatphoton energy = minimum energy needed to free an electron + max kinetic energy of emitted photoelectronAs we have been asked for the maximum wavelength , we know these photoelectrons just have en...
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Answered by kathryn b. • Physics tutor
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