www.facebook.com ... Physics (Episode 5): Thermodynamic Temperature. --- Please SUBSCRIBE to Science & Reason: • www.youtube.com • www.youtube.com • www.youtube.com --- What is the temperature of outer space? way out there between galaxies ... where there is only about one hydrogen atom per cubic meter? Can an individual atom be hot or cold? Can it even have a temperature? It sounds a little silly to say an atom is 27 degrees Fahrenheit or something. PARTICLE TEMPERATURE: But temperature is really a measure of the motion energy of an atom if the atom is motionless then it is at zero Kelvin. Now it can never be really motionless so it can never be at exactly zero Kelvin. And it moves pretty fast pretty fast as the temperature rises. At a tiny fraction of a degree above absolute zero, (700 nK (1 nK = 10−9 K)) the atom is already moving at about 1 centimeter per second. For subatomic particles the energy is often measured in MeV or GeV. An electron with 1 GeV of energy is moving close to the speed of light. And that corresponds to a temperature of ... 11 thousand billion kelvins. AVERAGE TEMPERATURE: For a collection of atoms or molecules like a gas or a crystal lattice, the temperature of the collection is just the average temperature of the group. But of course because of collisions and interactions at the molecular level, a group of atoms or molecules will distribute the total motion energy pretty evenly among the individuals in the collection. HEATFLOW: And if two or ...
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