For 300 years, from its discovery around 1602 until development of the quartz clock in the 1930s, the pendulum was the world's standard for accurate timekeeping.[2][68] In addition to clock pendulums, freeswinging seconds pendulums were widely used as precision timers in scientific experiments in the 17th and 18th centuries. Pendulums require great mechanical stability: a length change of only 0.02%, 0.2 mm in a grandfather clock pendulum, will cause an error of a minute per week.[69] , 11 -15 http://en.wikipedia.org/wiki... http://friendfeed.com/citizen... http://friendfeed.com/citizen... - Thomas Page

A dynamical system is a concept in mathematics where a fixed rule describes the time dependence of a point in a geometrical space. Examples include the mathematical models that describe the swinging of a clock pendulum, the flow of water in a pipe, and the number of fish each springtime in a lake. http://en.wikipedia.org/wiki... , http://en.wikipedia.org/wiki... http://en.wikipedia.org/wiki... , 2 -23 sort ? http://friendfeed.com/citizen... - Thomas Page

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, [[[[[[[[ http://en.wikipedia.org/wiki... http://xkcd.com/1276/ http://en.wikipedia.org/wiki... Acording to the nautical almanac, the Moon's semidiameter was predicted to be about 16.6' today. That is a diameter of about 33.2'. There are 60" per 1'. So the angular size is predicted to be about 1992", plus or minus about 6". Source: Online Nautical Almanac - Thomas Page

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http://en.wikipedia.org/wiki... Resonance http://en.wikipedia.org/wiki... - Thomas Page

Metronome http://en.wikipedia.org/wiki... Rhythm_and_meter http://en.wikipedia.org/wiki... http://en.wikipedia.org/wiki... [ 3 - 11 Different Strokes for Different Folks http://idioms.thefreedictionary.com/differe... - Thomas Page