Free Physics Textbook

How does one empty a bottle as rapidly as possible? What are the highest force and power in nature? How does one connect water pipes to a turning wheel? What are the dangers of a can of beans? What is the single page of unsolved problems in fundamental physics?
The Motion Mountain site at http://www.motionmountain.net/ publishes a free physics textbook that tells the story of how it became possible, after 2500 years of exploration, to answer such questions. The book is written to be entertaining, surprising and challenging on every page. With little mathematics, the text explores the most fascinating parts of mechanics, thermodynamics, special and general relativity, electrodynamics, quantum theory and modern attempts at unification. The essence of these fields is summarized in the most simple terms: it is shown how they are based on the notions of minimum entropy, maximum speed, maximum force, minimum change of charge and minimum action.

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