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  1. The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus, and ultimate tensile strength.The unit, named after Blaise Pascal, is defined as one newton per square metre and is equivalent to 10 barye (Ba) in the CGS system.

  2. Pascal's law (also Pascal's principle or the principle of transmission of fluid-pressure) is a principle in fluid mechanics given by Blaise Pascal that states that a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere.

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    • Definition
    • Miscellaneous
    • Uses
    • See Also

    The pascal can be expressed using SI derived units, or alternatively solely SI base units, as: Where N is the newton, m is the meter, kg is the kilogram, and sis the second.

    Standard atmospheric pressure is 101325 Pa = 101.325 kPa = 1013.25 hPa = 1.01325 bar = 0.101325 MPa = 760 Torr = 14.696 psi. This definition is used for pneumatic fluid power (ISO R554), and in the aerospace (ISO 2533) and petroleum (ISO 5024) industries. In 1985 the IUPAC recommended that the standard for atmospheric pressure should be harmonized to 100,000 Pa = 1 bar = 750 Torr. The same definition is used in the compressor and the pneumatic tool industries (ISO 2787). The Unicode computer character set has dedicated symbols ㎩ (Template:U+) for Pa and ㎪ (Template:U+) for kPa, but these exist merely for backward-compatibility with some older ideographic character-sets and are therefore deprecated.

    The pascal (Pa) or kilopascal (kPa) as a unit of pressure measurement is widely used throughout the world and has largely replaced the pounds per square inch (psi) unit, except in some countries that still use the Imperial measurement system. Tectonophysicistsuse the gigapascal (GPa) in measuring or calculating tectonic forces within the earth. In materials science, megapascals (MPa = N/mm2) or gigapascals (GPa = kN/mm2) are commonly used to measure stiffness or tensile strength of materials. Examples of (approximate) tensile modulus for several common substances include nylon at 2-4; hemp (fibre) at 58, aluminum at 69; tooth enamel at 83, copper at 117, steel at approximately 200 GPa, silkworm silk at 500, and diamondat 1220. The pascal is also equivalent to the SI unit of energy density, J/m3. This applies not only to the thermodynamics of pressurized gasses, but also to the energy density of electric, magnetic, and gravitationalfields. Other, older units of measure occasionally u...

    Orders of magnitude (pressure)
  4. Blaise Pascal, (born June 19, 1623, Clermont-Ferrand, France—died August 19, 1662, Paris), French mathematician, physicist, religious philosopher, and master of prose. He laid the foundation for the modern theory of probabilities , formulated what came to be known as Pascal’s principle of pressure , and propagated a religious doctrine that taught the experience of God through the heart rather than through reason.

  5. Third edition of this famous treatise by Blaise Pascal (1623-1662), a French mathematician, physicist, inventor and philosopher, in which he proves that hydrostatic pressure depends not on the weight of the fluid but on the elevation difference. This important text on physics is illustrated with two fold-out copper

    • Généralités
    • Installer Le Compilateur Free Pascal
    • Installer Lazarus
    • Contributeurs d'origine et Changements

    Pour ceux qui veulent seulement installer Lazarus et l'utiliser pour programmer, la meilleure solution est de télécharger et d'installer une version binaire, récente et stable (pour Linux un paquet '.rpm', ou un exécutable d'installation pour Windows '.exe' ou encore un paquet '.dmg' pour macOS). Vous pouvez lire les sections relatives à Linux ou Windows intitulées 'fpc binaries', ou les premiers paragraphes des sections qui traitent de l'installation de Lazarus sous Linux or Windows. La plupart des autres informations peuvent être ignorées sans risque. Pour ceux qui veulent participer au développement du compilateur ou de l'IDE, ou ceux qui veulent les outils les plus récents, une installation à partir des fichiers sources est nécessaire, et la plupart des informations de ce document sont importantes. Lazarus a deux composantes : 1. LCL - la bibliothèque de composants (Lazarus Component Library) 2. IDE - l'interface de développement (RAD tool) Les deux utilisent : 1. FPC - le compi...

    L'installation et la construction du compilateur Free Pascal fait l'objet d'une discussion très ouverte sur http://www.stack.nl/~marcov/buildfaq.pdf– C'est peut être un peu trop détaillé pour certains utilisateurs, mais cela reste toujours très compréhensible. Lazarus a besoin de fpc (FreePascal) version 2.0.2 ou plus, ainsi que des bibliothèques compilées fpc libs (binaires) et des code source fpc, le tout dans les mêmes versions.

    Installer Lazarus sous Windows

    La release actuelle de Lazarus pour windows sous forme binaire est très facile à installer et doit fonctionner sans soucis. Il est aussi possible d'installer l'ensemble Lazarus/FPC sur un disque USB (Il faut au minimum 256 MB de disponibles), pour travailler dans les cas où vous ne pouvez pas installer de logiciels sur la machine ou des le cas ou vous n'avez pas les droits de niveau administrateur. Il faut soignement régler les chemins pour le compilateur, dans les options d'environnement ain...

    Installation de Lazarus sous FreeBSD

    FreeBSD 5+ La dernière version portée de Lazarus dans FreeBSD est 0.9.20. Nous pouvons installer lazarus en utilisant le portage à FreeBSD. Si vous obtenez des messages à propos de fichiers source manquants, allez dans [menu bar >> Environment >> Environment Options >> Files Tab: FPC source library] et entrez le dossier des fichirs sources de FPC. Il peut être obtenu depuis /usr/ports/distfiles/freepascal Bonne chance, cela a fonctionné pour moi. --Jrmarino21:29, 4 Jan 2006 (CET)

    Installer Lazarus sous PC-BSD 1.0rc1+

    Vous pouvez installer Lazarus sous PB-BSD simplement en téléchargeant le PBI de Lazarus depuis Dir Notez que vous devez installer le portage de glib* depuis /usr/port/devel/glib* ou les packages glib avec pkg_add -r glib12 glib20.Cela sera résolu dans les nouvelles versions de PBI. [other OpenBSD/NetBSD/DragonFlyBSD goes here]

    Cette page a été convertie à partir de epikwiki version. 1. Initially imported and formatted. VlxAdmin9/22/2003 2. Changed Joe's part for Windows to require fpc 1.0.10. Vincent9/25/2003 3. Updated "What is required for lazarus". AndrewJohnson 10/1/2003 4. Finished formatted the InstallingLazarus page VlxAdmin2/22/2004 5. Posted some notes about Installing FPC and Lazarus: mostly reflecting experiences in trying to get the PATHS right in Linux. 3/11/2004 User:Kirkpatc 6. Copied the contents of my note into the main InstallingLazarus section, edited it slightly. I don't know how to remove the original note. 3/12/2004 User:Kirkpatc 7. Removed the original note. Tidied the wiki and formatting a bit. VlxAdmin 8. Corrected a couple of typos - 3/12/2004 User:Kirkpatc 9. Added link for daily snapshot deb packages - 3/27/2004 Vincent 10. Fixed links in GettingLazarus (downloading binaries) and several other pages. 22 July 2004 User:Kirkpatc 11. Added link for lazarus deb packages - 19 August...

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