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Home > Art, Film & Photography > Helium: Helium 3, Helium Solide, Hydreliox, Heliox, Heliair
Helium: Helium 3, Helium Solide, Hydreliox, Heliox, Heliair

Helium: Helium 3, Helium Solide, Hydreliox, Heliox, Heliair


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About the Book

Les achats comprennent une adhesion a l'essai gratuite au club de livres de l'editeur, dans lequel vous pouvez choisir parmi plus d'un million d'ouvrages, sans frais. Le livre consiste d'articles Wikipedia sur: Helium 3, Helium Solide, Hydreliox, Heliox, Heliair. Non illustre. Mises a jour gratuites en ligne. Extrait: L'helium 3 (He) est un isotope non radioactif d'helium. Le noyau de l'helium 3 est compose de seulement deux protons et d'un neutron. L'helium 3 est tres recherche pour la fusion nucleaire. Cet element est rare sur Terre. Issu de l'episode de la nucleosynthese primordiale aux premieres minutes de L'Univers. Il n'est pas produit par les etoiles, il y est consomme comme le lithium, le beryllium et le bore. dont les elements sont isoles des reactions de fusion du centre. Le vent solaire en envoie dans le restant du systeme solaire. Repousse par le champ magnetique terrestre, son accumulation a la surface de la Lune est facilitee par l'absence d'atmosphere sur notre satellite. Par consequent, la Lune en detient en abondance: les reserves estimees seraient de l'ordre du million de tonnes. Il est incorpore au regolite ou enfoui en faible profondeur de la surface. Lorsqu'on sait que 25 tonnes permettent de satisfaire les besoins des Etats-Unis et de l'Union europeenne pendant une annee, que cette energie permettrait aux Terriens de combler leurs besoins en energie pour des centaines d'annees, cela incite les enthousiastes a y voir un moteur puissant a son exploitation. Vision qui neglige les possibilites de substitution par d'autres moyens plus economiques et aussi plus durables: en effet, une tonne d'helium 3 vaut plusieurs milliards de dollars, faisant de cette ressource, la seule digne d'interet commercial a une reconquete de notre satellite dans un avenir proche... La technologie pour exploiter cette ressource est encore balbutiante. L'helium 3 pur est le liquide au point d'ebullition le plus bas qui existe, envir...http: //booksllc.net/?l=fr


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Product Details
  • ISBN-13: 9781159497804
  • Publisher: Books LLC
  • Publisher Imprint: Books LLC
  • Height: 152 mm
  • No of Pages: 24
  • Spine Width: 2 mm
  • Weight: 50 gr
  • ISBN-10: 115949780X
  • Publisher Date: 29 Jul 2010
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: Helium 3, Helium Solide, Hydreliox, Heliox, Heliair
  • Width: 229 mm


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