Gulielmus Thomson, baro Kelvin

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Gulielmus Thomson, baro Kelvin

Gulielmus Thomson, primus baro Kelvin (natus die 26 Iunii 1824 in oppido Belfast; mortuus die 17 Decembris 1907), physicus mathematicus et ingeniarius Britannicus, hodie praeclarissimus est non solum quia gradus temperaturae absolutae invenit[1] sed etiam quia analysim mathematicam scientiarum electromagneticae et thermodynamicae saeculi 19 maxime ingreditur.

Anno 1851 priscam formam secundae legis thermodynamicae his verbis statuit:

Non est possibile, nisi facultas immaterialis intercedit, phaenomenon mechanicae derivare e cuiusquam materiae parte quam frigescimus sub frigidissima tempuratura corporum circumpositorum.[2]

Suis cum Iacobo Ioule operis de caloris natura annos 1852-1856 theoriam kineticam caloris magnopere statuit.[3] Annos 1855-1856 Thomson quoque cum Petro Guthrie Tait collaboravit et scripsit suorum magnum "Detractatus de Philosophia Naturali" qui novam disciplinam physicae unificabat sub sententia energiae.[4]

Opera[recensere | fontem recensere]

  • W. Thomson, Mathematical and Physical Papers , Cambridge University Press, 6 vols (1882-1911). ISBN 0-521-05474-5.

Notae[recensere | fontem recensere]

  1. W. Thomson "On an absolute thermometric scale founded on Carnot's theory of the motive power of heat, and calculated from Regnault's observations," Math. and Phys. Papers 1, 100-106 (1848).
  2. Anglice: "It is impossible, by means of inanimate material agency, to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects," W. Thomson, "On the dynamical theory of heat; with numerical results deduced from Mr. Joule's equivalent of a thermal unit and M. Regnault's observations on steam," Math. and Phys. Papers 1 (1851) p.179.
  3. W. Thomson, "On the thermal effects of fluids in motion, " Math. and Phys. Papers 1, pp. 333-455 (1856).
  4. W. Thomson et P. G. Tait, Treatise on Natural Philosophy, Oxford, 1867.