The Weight of the Vacuum PDF Download
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Author: Helge S. Kragh
Publisher: Springer
ISBN: 3642550908
Category : Science
Languages : en
Pages : 117
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Book Description
The 2011 Nobel Prize in Physics was awarded for the discovery of cosmic acceleration due to dark energy, a discovery that is all the more perplexing as nobody knows what dark energy actually is. We put the modern concept of cosmological vacuum energy into historical context and show how it grew out of disparate roots in quantum mechanics (zero-point energy) and relativity theory (the cosmological constant, Einstein's “greatest blunder”). These two influences have remained strangely aloof and still co-exist in an uneasy alliance that is at the heart of the greatest crisis in theoretical physics, the cosmological-constant problem.
Author: Helge S. Kragh
Publisher: Springer
ISBN: 3642550908
Category : Science
Languages : en
Pages : 117
Get Book Here
Book Description
The 2011 Nobel Prize in Physics was awarded for the discovery of cosmic acceleration due to dark energy, a discovery that is all the more perplexing as nobody knows what dark energy actually is. We put the modern concept of cosmological vacuum energy into historical context and show how it grew out of disparate roots in quantum mechanics (zero-point energy) and relativity theory (the cosmological constant, Einstein's “greatest blunder”). These two influences have remained strangely aloof and still co-exist in an uneasy alliance that is at the heart of the greatest crisis in theoretical physics, the cosmological-constant problem.
Author: Carroll Gantz
Publisher: McFarland
ISBN: 0786493216
Category : Social Science
Languages : en
Pages : 241
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Book Description
House cleaning has been an innate human activity forever but only since the early 19th century have mechanical devices replaced the physical labor (performed mostly by women). Mechanical carpet sweepers were replaced by manual suction cleaners, which in turn were replaced by electric vacuum cleaners in the early 20th century. Innovative inventors, who improved vacuum cleaners as electricity became commonly available, made these advances possible. Many early manufacturers failed, but some, such as Bissell, Hoover, Eureka and others, became household names as they competed for global dominance with improved features, performance and appearance. This book describes the fascinating people who made this possible, as well as the economic, cultural and technological contexts of their times. From obscure beginnings 200 years ago, vacuum cleaners have become an integral part of modern household culture.
Author: Richard E. Lawn
Publisher: Royal Society of Chemistry
ISBN: 9780854044634
Category : Education
Languages : en
Pages : 28
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Book Description
"Measurement of mass is one of the most frequently carried out operations in an analytical laboratory. Accurate mass measurements are required for such purposes as: obtaining a known quantity of a sample for analysis ; preparation of analytical reagents ; and preparation of calibration standards. This document provides guidance on various important aspects of mass measurement as it is commonly carried out in alalytical laboratories." - page 1.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 460
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Book Description
Author: Joint Executive Committee of the Vocational Education Committees of the Pulp and Paper Industry of the United States and Canada
Publisher:
ISBN:
Category : Paper industry
Languages : en
Pages : 474
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Book Description
Author: David M. Hata
Publisher:
ISBN: 9781942341970
Category : Vacuum technology
Languages : en
Pages : 0
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Book Description
"This book approaches vacuum systems from a pressure regime viewpoint, covering basic vacuum science, followed by the rough vacuum regime, including gas load, pumping mechanisms, pressure measurement, vacuum system construction, and basic troubleshooting concepts. The study of high vacuum systems follows and the same topics are revisited, and finally the topics of leak detection and residual gas analysis are discussed."--Publisher.
Author: Joint Textbook Committee of the Paper Industry
Publisher:
ISBN:
Category : Paper industry
Languages : en
Pages : 474
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Book Description
Author: C. Wade Savage
Publisher: Univ of California Press
ISBN: 9780520015272
Category : Psychology
Languages : en
Pages : 596
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 462
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 466
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Book Description
Contains the proceedings of scientific societies.
