Lecture 17 - The Science of Energy

Lecture 17 - The Science of Energy - Power 15:40 1)...

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Unformatted text preview: Power 15:40 1) Unifying Physics pulls together a variety of rather distinct areas of specialty and interest in natural history to do with fossils, geographical distribution, and homologies This pulling together is an element of whats going on in the mid 19 th century o The unification of modern disciplines to form physics (physical sciences) Things like mechanics, optics, electricity, the study of various aspects of the physical world (inanimate) Very often this set of physical sciences would be studied by the same people. Conceptually autonomous (optics and law of refraction, electricity and charges, mechanics and inertia) These concepts were certainly concepts that people in the early 19 th century had the dream of pulling them together. They wanted them to be understood in the same roster. Lapalcian approach to physical sciences legacy: using as tools in attempting to build this unification precise quantitative experimental work. This is adopted by the French scientists, something that helps pulling together the physical sciences. A more common set of skills and approaches relating to the study. The emergence of coherent physics was related very closely to the development of the concept of energy. In the 18 th century (rational mechanics, motion, collision, gravitational force, Newton) it had a concept of VIS VIVA (LIFE FORCE) Vis Viva and Energy Mv squared. Life Force. It wasnt in any respect a version of the 19 th century concept of energy. The point is that although it was conserved in elastic collisions, it was not conserved in inelastic collisions. ENERGY ISNT ENERGY unless its CONSERVED!!! Vis viva in the 18 th century wasnt really a form of energy, it wasnt conserved. The ideas leading to the 19 th century concept of energy didnt in fact come from a continuous development within that preexisting tradition of Newtonian rational mechanics, but they came out of an engineering tradition instead. Relating to the use of steam engines. 2) Sadi Carnot: Did work on heat and the production of mechanical work from steam engines. This is considered the first stage of 19 th century thermodynamics. He was attempting to make sense of this new industrial machine (made by James Watt). For the industrial revolution. Carnot was educated in the physical sciences and engineering. The best place to do this was the Ecole Polytechinque in Paris. His approach combined a good knowledge of physical sciences of a Laplacian kind with engineering training You understand heat and electricity as material fluids (Laplacian way)...
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This note was uploaded on 09/30/2009 for the course STS 2821 taught by Professor Dear during the Spring '09 term at Cornell University (Engineering School).

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Lecture 17 - The Science of Energy - Power 15:40 1)...

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