156 résultats pour "rotative"
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SYSTÈME SOLAIREGÉNÉRALITÉSOn entend par « Système solaire » une famille de corps célestes formée par l'étoileSoleil et par une multitude de corps distribués autour d'elle.
2 auraient échappé jusqu'ici à nos observations. La génération actuelle d'instruments astronomiques n'est pas en mesure d'identifier des corps de dimensions planétaires aux confins du domaine gravitationnel du Soleil. Les astronomes pensent que, s'il y avait une autre planète au-delà des orbites de Neptune et de Pluton, celle-ci pourrait être découverte grâce aux perturbations induites par sa force d'attraction. Vers la fin des années 80, analysant les trajectoires des sondes interplanét...
- Prothèses Myoélectriques
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Machine
I
INTRODUCTION
Machine, simple device that affects the force, or effort, needed to do a certain amount of work.
to decrease the amount of force needed to do work or to change the direction of the force. The wheel and axle and some levers can also be used to increase the speedof performance of a task, but doing so always increases the amount of force needed. A Inclined Plane NutsNuts are pieces of metal with a hole in the middle. They are screwed on the end of a bolt as a fastening. Nuts come invarying shapes, depending on their intended use.© Microsoft Corporation. All Rights Reserved. Ramps and staircas...
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Ocean and Oceanography.
of sediment. When studied in sedimentary core samples, which can represent many millions of years of deposits, they provide a detailed and continuous history of theearth’s environmental changes. The record is particularly informative for the most recent 2 million to 5 million years, during which major fluctuations in global climatehave occurred. Successive ice ages can be traced by the relative scarcity or abundance of the shells of warm-water and cold-water diatoms in various layers of asedimen...
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Ocean and Oceanography - Geography.
of sediment. When studied in sedimentary core samples, which can represent many millions of years of deposits, they provide a detailed and continuous history of theearth’s environmental changes. The record is particularly informative for the most recent 2 million to 5 million years, during which major fluctuations in global climatehave occurred. Successive ice ages can be traced by the relative scarcity or abundance of the shells of warm-water and cold-water diatoms in various layers of asedimen...
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Syria - country.
D Education Primary education is free and compulsory for all children aged 6 through 12. Some 78 percent of the adult Syrian population was estimated to be literate in 2005.Primary schools enrolled 2.8 million pupils in the 2000 school year, and 1.1 million students attended secondary schools and vocational institutes. In 1998, 94,110 Syrian students were enrolled in institutes of higher education. Syria has universities in Damascus, Ḩalab, Ḩim ş, and Al L ādhiq īyah. Also in Damascus isthe Ar...