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A tank is filled with water up to the height H0. At the bottom of the tank, there is a tap which is opened at t=0. How does the height of liquid change with time?(Hint: dH/dt is proportional to -H)

This is a typical C4 differential equation question. The same algorithm could be used for a lot of other problems. First of all, from the hint we have that dH/dt = -kH (1). We need to separate the variables ...
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Answered by Maxim B. • Maths tutor
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Décrivez vos opinions sur le réchauffement climatique. Utilisez des exemples pour soutenir vos avis.

Le réchauffement climatique est un problème qui atteint de plus en plus de monde, touchant la majorité des populations d'une manière ou d'une autre. Ce phénomène concerne particulièrement les petites iles tr...
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Answered by Faye H. • French tutor
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How far did the industrial revolution adversely affect the lives of people in Britain?

Industrialisation transformed 19 th century Britain from a predominantly agricultural to an industrialised and mechanised nation; this ‘workshop of the world’ resulted in the landscape changing with large nu...
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Answered by Nicola W. • History tutor
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Explain the Bradshaw Model

The Bradshaw model is a theory which shows how the size of the river affects stream flow. As the river flows downstream, tributaries feed more water into the stream system leading to a higher discharge. This...
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Answered by Romy S. • Geography tutor
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Explain the difference between analytic and ontological reduction

The difference concerns what is being reduced. Analytic reduction concerns concepts and language whereas ontological reduction concerns the nature of beings/ existence. Analytic reduction involves showing th...
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Answered by Amy B. • Philosophy tutor
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