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GRAM-CALORIE [1 record]

Record 1 2003-12-03

English

Subject field(s)
  • Metrology and Units of Measure
DEF

Unit of radiant energy per unit area equal to 1 gram-calorie per cm².

CONT

The intensity of insolation or shortwave solar radiation is normally expressed in langleys (cal/sq.cm) per unit of time (min., hr., or day).

OBS

Named for Samuel P. Langley (1834-1906), a pioneering solar energy researcher at the Smithsonian Institution ...

OBS

Langley (L): Now obsolete.

OBS

Modern meteorologists tend to use the mks unit W m².

French

Domaine(s)
  • Unités de mesure et métrologie
DEF

Unité d'énergie rayonnante par unité de surface égale à l calorie-gramme par cm².

CONT

L'intensité de l'insolation ou rayonnement solaire de courte longueur d'onde est normalement exprimée en «Langleys» (cal/cm²) par unité de temps (minutes, heures ou jours).

CONT

274 langleys (ly), soit 274 petites calories par centimètre carré de surface horizontale par jour moyen ou 2637 Kilowatts (kW) par hectare, en ne comptant que les heures de jour.

OBS

langley, Ly : CGS - 1 cal/cm². Étymologie : vient du savant Samuel Langley.

OBS

[...] symbole lg.

Spanish

Campo(s) temático(s)
  • Metrología y unidades de medida
DEF

Unidad de energía radiante igual a 1 caloría-gramo por cm².

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