From: Josef 'Jupp' SCHUGT Date: 2004-02-09T12:47:43+09:00 Subject: Re: Ruby math: Newton's Law of Cooling Hi! * Florian G. Pflug: > I only tells you at which time the water in the pipes will reach 0 > degrees celcius (sorry, don't know what this is is farenheit). 0 degree Celsius is 0 degree centigrade is 32 degree Fahrenheit is 273.15 Kelvin (sometimes mistermed 'degree Kelvin' even though it is *no* degree scale) > But even after reaching 0 degrees, it will take quite a time until > the water starts to freeze - the water has to loose a lot of energy > to it's environment to get from the liquid state into crystaline > state. To give numbers the specific melting enthalpie of H20 is 334 kJ/kg. Note that impurities like HCl can change the melting temperature of water by several Kelvin. Josef 'Jupp' SCHUGT -- http://oss.erdfunkstelle.de/ruby/ - German comp.lang.ruby-FAQ http://rubyforge.org/users/jupp/ - Ruby projects at Rubyforge -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Germany 2004: To boldly spy where no GESTAPO / STASI has spied before