Libros de Física, página 60 de 367

En este libro se abordan cuestiones relacionadas con el campo electromagnético que forman parte del programa de la asignatura Electromagnetismo II del Grado en Física, y que actualmente se imparte en la UNED. Hemos pretendido dar continuidad a la anterior publicacion, Electromagnetismo I, y para ello mantenemos la misma notacion y los mismos puntos de partida. Consideramos necesaria esta segunda parte para poder abordar la asignatura de Electromagnetismo del segundo curso del Grado en Fisica en la UNED, de forma completa y autocontenida. A lo largo del texto se proponen una serie de ejercicios de autoevaluacion, con sus soluciones, que ejemplifican el contenido teorico explicado en la seccion correspondiente y al final de cada tema incluimos una coleccion de ejercicios propuestos con los que el estudiante puede valorar su aprendizaje.

a valoració estaticodinàmica global (VEDG) que proposem es realitza amb la doble finalitat d’analitzar les alteracions de l’estàtica i de la dinàmica des d’un punt de vista global i les seves possibl

From one of our most eminent theoretical astrophysicists and an award-winning writer, a fascinating, firsthand history of the scientific pursuit to detect gravitational waves: the holy grail of modern cosmology, the soundtrack of the universe.In 1916, Einstein became the first to predict the existence of gravitational waves: sounds without a material medium generated by the unfathomably energy-producing collision of black holes. Now Janna Levin, herself an astrophysicist, recounts the story of the search over the last fifty years for these elusive waves--a quest that has culminated in the creation of the most expensive project ever funded by the National Science Foundation ($1 billion-plus). She makes clear how the waves are created in the cosmic collision of black holes, and why the waves can never be detected by telescope.And, most revealingly, she delves into the lives and fates of the four scientists currently engaged in--and obsessed with--discerning this soundtrack of the universe''s history. Levin''s account of the surprises, disappointments, achievements, and risks of this unfolding story provides us with a uniquely compelling and intimate portrait of the people and processes of modern science.

Tot el que cal saber sobre física, l’univers i el nostre lloc al món en set lliçons plenes de bellesa que han captivat els lectors italians. «Hi ha fronteres, en les quals estem aprenent i crema el d

The full inside story of the detection of gravitational waves at LIGO, one of the most ambitious feats in scientific history.Travel around the world 100 billion times. A strong gravitational wave will briefly change that distance by less than the thickness of a human hair. We have perhaps less than a few tenths of a second to perform this measurement. And we don''t know if this infinitesimal event will come next month, next year or perhaps in thirty years.In 1916 Einstein predicted the existence of gravitational waves: miniscule ripples in the very fabric of spacetime generated by unfathomably powerful events. If such vibrations could somehow be recorded, we could observe our universe for the first time through sound: the hissing of the Big Bang, the whale-like tunes of collapsing stars, the low tones of merging galaxies, the drumbeat of two black holes collapsing into one. For decades, astrophysicists have searched for a way of doing soIn 2016 a team of hundreds of scientists at work on a billion-dollar experiment made history when they announced the first ever detection of a gravitational wave, confirming Einstein''s prediction. This is their story, and the story of the most sensitive scientific instrument ever made: LIGO.Based on complete access to LIGO and the scientists who created it, Black Hole Blues provides a firsthand account of this astonishing achievement: a compelling, intimate portrait of cutting-edge science at its most awe-inspiring and ambitious.

Con unas imágenes digitales asombrosas, esta obra te desvela todos los secretos del universo: desde el big bang y los agujeros negros hasta los viajes espaciales.Viajaal centro explosivo de una supergigante roja.Descubrelas maravillas que esconden los planetas y satelites del Sistema Solar.Investigacomo funcionan las naves, los trajes y las estaciones espaciales.

Las estrellas dibujan por la noche formas sobre las que los humanos han proyectado imágenes e historias: la Osa Mayor, la Osa Menor, la Lira u Orión son relativamente conocidas y de fácil localizació

This book provides a completely revised and expanded version of the previous classic edition General Relativity and Relativistic Astrophysics.In Part I the foundations of general relativity are thoroughly developed, while Part II is devoted to tests of general relativity and many of its applications. Binary pulsars our best laboratories for general relativity are studied in considerable detail. An introduction to gravitational lensing theory is included as well, so as to make the current literature on the subject accessible to readers.Considerable attention is devoted to the study of compact objects, especially to black holes. This includes a detailed derivation of the Kerr solution, Israels proof of his uniqueness theorem, and a derivation of the basic laws of black hole physics. Part II ends with Wittens proof of the positive energy theorem, which is presented in detail, together with the required tools on spin structures and spinor analysis. In Part III, all of the differential geometric tools required are developed in detail. A great deal of effort went into refining and improving the text for the new edition. New material has been added, including a chapter on cosmology.The book addresses undergraduate and graduate students in physics, astrophysics and mathematics. It utilizes a very well structured approach, which should help it continue to be a standard work for a modern treatment of gravitational physics. The clear presentation of differential geometry also makes it useful for work on string theory and other fields of physics, classical as well as quantum.

«Existe un mundo oculto a nuestra mirada. Un mundo invisible simplemente porque no se deja perturbar por la luz visible, pero que nos abre sus puertas cuando nos acercamos a él con otras energías y o

Material imprescindible para asistir al examen de la asignatura de Termotecnia.

Hasta 1887 no se creó el Instituto Central Meteorológico en Madrid, y sólo un año antes se publicó en España el primer boletín meteorológico con apoyo institucional. Hasta entonces, la única previsión del tiempo era dominio de los almanaques, que se publicaban por provincias y regiones, con avances de la temperie anonimos, laconicos, ambiguos y carentes de metodo.Dos zaragozanos, Joaquin Yague en 1857 con su Calendario El Cielo, y Mariano Castillo en 1863 con El Firmamento, causaron una autentica revolucion en este genero de publicaciones, al aportar pronosticos detallados y extensos sobre heladas, inundaciones, vendavales, galernas en el mar, etc. que avisaban con meses de antelacion a las poblaciones mas expuestas a esta clase de fenomenos. Las tiradas de ambos zaragozanos fueron un rotundo exito editorial, por lo que enseguida surgio una pleyade de imitadores en busca de negocio facil.Aunque Mariano Castillo murio en 1875, su famoso almanaque El Firmamento perduro durante el siglo XX, y entrados en el XXI sigue gozando de una gran popularidad.¿Cual fe la clave del exito de los Zaragozanos? ¿Que metodos empleaban para adelantar el tiempo de años enteros? Este trabajo de F. J. Roche y J. L. Pascual indaga en la vida de ambos personajes y en las doctrinas y autores que inspiraron su obra de exitosos pronosticadores del tiempo en la España de la segunda mitad del siglo XIX, confirmando que se trataba de lunaristas en la linea de Giuseppe Toaldo en Italia, de Jean Baptiste Lamarck en Francia, y en España del matematico Jose Mariano Vallejo, asi como del primer catedratico de Meteorologia que hubo en Madrid, Jose Garriga. Es decir, que predecian el caracter de los años, de las estaciones y de los meses y semanas por las conexiones de la atmosfera con los ciclos lunares, aun discutidas y puestas en duda por nuestros cientificos.

"Cuando se escribe un tratado sobre cualquier tema científico, el autor siempre procura que sea útil al mayor número de lectores; la estructura de este libro ha procurado adaptarse a esta idea. Este

In 1921, five years after the appearance of his comprehensive paper on general relativity and twelve years before he left Europe permanently to join the Institute for Advanced Study, Albert Einstein visited Princeton University, where he delivered the Stafford Little Lectures for that year. These four lectures constituted an overview of his then-controversial theory of relativity. Princeton University Press made the lectures available under the title The Meaning of Relativity, the first book by Einstein to be produced by an American publisher. As subsequent editions were brought out by the Press, Einstein included new material amplifying the theory. A revised version of the appendix "Relativistic Theory of the Non-Symmetric Field," added to the posthumous edition of 1956, was Einstein's last scientific paper.

This is the first book devoted entirely to Particle Swarm Optimization (PSO), which is a non-specific algorithm, similar to evolutionary algorithms, such as taboo search and ant colonies.Since its original development in 1995, PSO has mainly been applied to continuous-discrete heterogeneous strongly non-linear numerical optimization, and it is thus used almost everywhere in the world. Its convergence rate also makes it a preferred tool in dynamic optimization.Particle Swarm Optimization explains the basic principles of the subject, particularly the concepts of particles, information link, memory and cooperation. Starting from a simple but efficient parametric version coded in a few lines, it shows how this can be gradually enhanced to lead to a fully adaptive version. All source programs are either included in the book or are downloadable for free.

Los conocimientos acerca de la física forman una parte muy valiosa de una educación integral. Ver la física como el estudio de las reglas que rigen la naturaleza contribuirá con tu capacidad de asombro y ampliara la forma en que ves el mundo. Que emocionante es saber que las reglas que gobiernan la caida de una manzana tambien se aplican a una estacion espacial en orbita, que los colores del crepusculo se relacionen con el azul del cielo al mediodia, y que las leyes descubiertas por Faraday y Maxwell demuestran la forma en que la electricidad y el magnetismo se combinan para crear luz.