Download PDF by José Manuel Sánchez Ron: Albert Einstein (su vida, su obra y su mundo)

By José Manuel Sánchez Ron

ISBN-10: 8498929164

ISBN-13: 9788498929164

Considerado por los angeles revista Time en diciembre de 1999 como «el Personaje del siglo xx», Albert Einstein dejó una huella imborrable en l. a. historia de l. a. ciencia, con profundas implicaciones tanto en l. a. cultura como en el desarrollo sociopolítico de aquel siglo. Fue el gran protagonista de l. a. denominada «revolución relativista», que alteró de manera radical las rules que hasta entonces se sostenían sobre dos conceptos tan fundamentales como espacio y tiempo, y que culminó en los angeles que probablemente sea l. a. creación más unique de toda los angeles historia de los angeles ciencia, l. a. teoría de l. a. relatividad normal, que desbancó a los angeles vieja teoría de los angeles gravitación common de Isaac Newton. Y aunque finalmente repudió los angeles dirección que tomó, fue también uno de los responsables de que l. a. otra gran revolución de los angeles física del siglo xx, los angeles de l. a. física cuántica, se pusiera en marcha. En este libro, combinando el máximo rigor histórico con su acostumbrada claridad y elegancia expositiva, el catedrático de Historia de l. a. Ciencia y miembro de los angeles actual Academia Española, Sánchez Ron desentraña los angeles historia de los trabajos científicos de Einstein, que involucraron a una parte sustancial de los mejores físicos de los angeles primera mitad del siglo xx. Pero no se limita sólo al mundo de los angeles ciencia; al fin y al cabo, Einstein fue algo así como «un espejo del siglo xx», estando su vida indisolublemente asociada a los principales acontecimientos políticos y sociales de su tiempo (entre ellos las dos guerras mundiales), una dimensión de su biografía que, junto a l. a. de los avatares personales de su vida, explica el profesor Sánchez Ron, en un libro, profusamente ilustrado, que constituirá un hito en los angeles historia de los angeles ciencia, en cualquier idioma.

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2. What roles do disk instabilities play in the whole accretion/outflow process? 3. What are the dominant wind acceleration processes? What are the relevant timescales for mass ejection? 4. How does this high-energy environment affect the chemical properties of the disk and planetary building? 5. How important is this mechanism when radiation pressure becomes significant as for Herbig Ae/Be stars? Fig. 3 The interaction between the stellar magnetic field and the disk twists the stellar field lines due to the differential rotation.

The high temperatures of the gas in the halo must be explained by energetic processes, most likely occurring in the Galactic disk (though external sources could contribute). The most likely energy source for these processes are massive OB stars. There is also evidence that hot halo gas has cooled, as provided by the presence of the high-ionisation UV resonance lines. Some of the UV resonance lines might be produced by photoionisation of gas near 104 K, but there is good evidence that the high-ionisation lines, such as Si IV, C IV and N V are due to gas that is cooling (Savage and Sembach, 1994).

How does this high-energy environment affect the chemical properties of the disk and planetary building? 5. How important is this mechanism when radiation pressure becomes significant as for Herbig Ae/Be stars? Fig. 3 The interaction between the stellar magnetic field and the disk twists the stellar field lines due to the differential rotation. The toroidal magnetic field generated out of the poloidal flux and the associated pressure tends to push the field lines outwards, inflating them, and eventually braking the magnetic link between the star and the disk (boundary between Regions I and II).

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Albert Einstein (su vida, su obra y su mundo) by José Manuel Sánchez Ron


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