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Methane is a gas made up of 1 carbon atom for every 4 hydrogen atoms. The central carbon atom forms covalent bonds with these 4 hydrogen atoms (they share an electron each), and this sharing completes the...

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 separa...

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...

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 ...

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. T...