differential equation

Those who understand compound interest are destined to collect it. Those who don't are doomed to pay it - or so says a well-known source of financial advice. But what is compound interest, and why is it so important? John H. Webb explains.
On 11th August 1999 a total eclipse of the Sun will be visible from parts of the UK. It will provide a spectacular display, but why is the Sun so interesting? Helen Mason explains.
In the first of two articles, David Henwood discusses the vibrations that can be harnessed by musical instrument makers.
Read about what it is like to work at the Meteorological Office in this interview with Helen Hewson. There's also a contact point for careers information.
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