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Do we live at the 'end of history'?

The term “end of history” comes from the academic works of Francis Fukuyama, who coined the term to signpost the endpoint of mankind’s ideological and socio-cultural evolution. He believed that following the...
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When to use the verb "ser" or "estar"?

The Spanish verbs "ser" and "estar" both mean "to be " but they are used differently."Ser" is used for a permanent state (that don't change). E.g.: "Soy una mujer...
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Answered by Jazmina N. • Spanish tutor
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Prove by contradiction that sqrt(3) is irrational. (5 marks)

To the contrary assume that sqrt(3) is a rational number. Thus we can write sqrt(3) = a/b where a and b are coprime integers and b is non-zero. (1 mark for this or equivalent statement - may have that this f...
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Answered by Dan S. • Maths tutor
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Explain why for heavy nuclei there is imbalance in the number of protons and neutrons. Give reference to the range and particle type of the forces that influence this imbalance.

In the nucleus the forces that govern how the body is kept together is the Strong Nuclear Force and the Electromagnetic Force, these two force differ in range and the type of particle they interfere with. Th...
Answered by • Physics tutor
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What are the possible effects of over fertilisation on aquatic wildlife

Over fertilisation is heavily linked to leeching and eutrophication. By adding more fertilisers and minerals to the soil, the soil is more likely to become saturated. Therefore, when it rains, the soluble fe...
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Answered by Maddie J. • Biology tutor
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