Work of breathing When there is increased gas flow resistance, the optimal respiratory rate decreases. This work (generally during the inhalation phase) is stored as potential energy which is recovered during exhalation. A pressure difference is required to overcome the frictional resistance to gas flow due to viscosity, and to provide non-elastic components of movement of the airway tissues to accommodate pulmonary volume change. Total work done against non elastic forces is 35% of total. Work is defined as a force applied over a distance. The SI unit of work is the Joule, equivalent to a force of 1 Newton exerted along a
The Quest: Energy, Security, and the Remaking of the Modern World and not taking a strong position on subjects such as climate change, although "The Wall Street Journal" said that the book succumbed to "the conventional alarmist storyline” on climate. Finally, peak oil advocates take strong issue with Yergin’s handling of the subject in the book, particularly the discussion of the founding of the peak theory and the potential for future oil discoveries. The Quest: Energy, Security, and the Remaking of the Modern World The Quest: Energy, Security, and the Remaking of the Modern World is an international bestselling book by energy expert Daniel Yergin. The book was initially published on