TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 DEF

A cloud chamber containing air supersaturated with water vapor by sudden expansion, in which rapidly moving nuclear particles such as alpha or beta rays produced ionization tracks by condensation of vapor on the ions produced by the rays.  4, fiche 1, Anglais, - Wilson%20cloud%20chamber

Record number: 1, Textual support number: 1 CONT

Cloud chambers were first developed by Charles T.R. Wilson around 1911 for experiments on the formation of rain clouds. Wilson knew that water vapour condensed around ions, atoms which have become charged by gaining or losing electrons. However, an alpha particle, for example, which had an electric charge, would leave a trail of ions as it passed through a gas. If water vapour condensed on these ions, the track of the alpha particle would become visible as a line of water droplets.  2, fiche 1, Anglais, - Wilson%20cloud%20chamber

Record number: 1, Textual support number: 2 CONT

There are two basic types of cloud chambers in use today; (1) the expansion chamber ... which depends upon expansion of the air, within the chamber, to cool it and thus create a supersaturated atmosphere, and (2) the continuous or diffusion type chamber ..., that creates a supersaturated atmosphere by diffusion of vapor from the warm upper region of the chamber to the cooled bottom of the chamber. In both types, electrically charged ions created by nuclear particles colliding with atoms within the chamber atmosphere, serve as nuclei of condensation.  5, fiche 1, Anglais, - Wilson%20cloud%20chamber

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 DEF

Chambre à nuage dans laquelle la sursaturation de la vapeur est obtenue pendant un court intervalle de temps par une détente rapide.  1, fiche 1, Français, - chambre%20de%20Wilson

Fiche 1,  Justifications,  Espagnol

Record number: 1, Textual support number: 1 DEF

Recipiente, a menudo cilíndrico, dotado de una ventana transparente y de un pistón móvil que permite que el vapor de agua en el recipiente se expanda y se condense cuando la presión disminuye al ser desplazado el pistón hacia afuera.  2, fiche 1, Espagnol, - c%C3%A1mara%20de%20Wilson

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

The amount of energy it takes to convert 2000 lbs. of water at 32° F. to ice at 32° F. during a 24 hour period. Calculation: 2000 lbs.H2O x 144 Btu/lb. = 288,000 Btu’s in 24 Hrs. Divide by 24 hrs = 12,000 Btu/hr. Therefore a "ton" of cooling is a measure of heat energy which is roughly equivalent to 12,000 BTU’s.  5, fiche 2, Anglais, - ton%20of%20refrigeration

Record number: 2, Textual support number: 1 CONT

One ton of refrigeration capacity equals 12000 BTU/HR.  3, fiche 2, Anglais, - ton%20of%20refrigeration

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 CONT

L'unité de mesure servant à déterminer la capacité d'un système de climatisation est la tonne de réfrigération. Celle-ci correspond à l'effet de refroidissement produit par la fonte d'une tonne de glace (2 000 lb) en 24 heures, c'est-à-dire 12 000 Btu/h.  2, fiche 2, Français, - tonne%20de%20r%C3%A9frig%C3%A9ration

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 OBS

Authors: D.H. Hutson and T.R. Roberts; 1981-1983.  1, fiche 3, Anglais, - Progress%20in%20pesticides%20biochemistry

Fiche 3,  Justifications,  Français

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

Record number: 4, Textual support number: 1 OBS

Any safe bearing one of the following Underwriters’ Laboratories Labels: Torch-resisting safe T.R.  1, fiche 4, Anglais, - torch%2Dresisting%20safe

Fiche 4,  Justifications,  Français

Record number: 4, Textual support number: 1 OBS

Tout coffre-fort qui porte l'une des étiquettes suivantes des "Underwriters Laboratories": Coffre-fort résistant aux torches T.R.  1, fiche 4, Français, - coffre%2Dfort%20r%C3%A9sistant%20aux%20torches

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

Record number: 5, Textual support number: 1 DEF

A phrase, popularized by T.R. Schellenberg, referring to the value of records that derives from the information they contain "on persons, place, subjects and the like with which public agencies deal; not from the information that is in such records on the public agencies themselves."  1, fiche 5, Anglais, - informational%20value

Fiche 5,  Justifications,  Français

Record number: 5, Textual support number: 1 DEF

(...) propriété que possède un document de servir à reconstituer les activités antérieures d'un ministère, de fournir des renseignements utiles à la planification actuelle ou projetée, et de fournir des données sur lesquelles on peut fonder de nouvelles activités.  1, fiche 5, Français, - valeur%20informative

Fiche 5,  Justifications,  Espagnol