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Why did Tsar Nicholas II abdicate from the Russian throne?

Tsar Nicholas II's abdication came against a backdrop of a changing political, social and religious nation but the catalyst for change came through Russia's struggles in the First World War. Nicholas was cho...
JC
Answered by James C. • History tutor
40038 Views

How many sociological schools of thought should I discuss in a typical essay?

Generally, while this differs in term of exam board specification and type of question, two or three as focal points seems to be a fairly good rule of thumb. Any more prevents adequate discussion and means y...
RB
Answered by Rosa B. • Sociology tutor
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How can I find the frequency of genotype Bb in a population given that the frequency of BB is 0.49? (Where B = dominant allele, b = recessive allele on the same gene).

The proportion of the population with genotype Bb can be calculated using the two equations of the Hardy-Weinberg principle. These equations are: p + q = 1 where: p = frequency of the dominant allele (B) q =...
CA
Answered by Caitlin A. • Biology tutor
7792 Views

What are public goods and how do they lead to the 'free-rider' problem?

A pure public good is a good that is consumed collectively; it is both non-excludable and non-rivalrous. These two main characteristics mean that people can't be stopped from consuming the good, and that one...
MC
Answered by Mathew C. • Economics tutor
3673 Views

Why do volcanoes form?

The primary ingredient for a volcano is magma. Magma is what we call melted rock. When rocks melt at depth they become less dense than the solid rocks around them and therefore they rise to the surface of th...
JL
Answered by Jake L. • Geology tutor
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