Kinetic Gas Theory
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Professor McBride introduces the theory behind light diffraction by charged particles and its application to the study of the electron distribution in molecules by x-ray diffraction. The roles of molecular pattern and crystal lattice repetition are illustrated by shining laser light through diffraction masks to generate patterns reminiscent of those encountered in X-ray studies of ordered solids.
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The lecture begins with a review of the loop-the-loop problem. Professor Shankar then reviews basic terminology in relation to work, kinetic energy and potential energy. He then goes on to define the Work-Energy Theorem. Finally, the Law of Conservation of Energy is discussed and demonstrated with specific examples.
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The concepts introduced are: work, conservative forces, potential energy, kinetic energy, mechanical energy, and Newton's law of universal gravitation. A wrecking ball is converting gravitational potential energy into kinetic energy and back and forth. If released with zero speed, the wrecking ball should NOT swing higher than its height when it was released. Professor Lewin puts his life on the line by demonstrating this.
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This lecture gives a brief history of the young field of financial theory, which began in business schools quite separate from economics, and of my growing interest in the field and in Wall Street. A cornerstone of standard financial theory is the efficient markets hypothesis, but that has been discredited by the financial crisis of 2007-09. This lecture describes the kinds of questions standard financial theory nevertheless answers well. ...more
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In this lecture, Professor Paul Fry examines acts of reading and interpretation by way of the theory of hermeneutics. The origins of hermeneutic thought are traced through Western literature. The mechanics of hermeneutics, including the idea of a hermeneutic circle, are explored in detail with reference to the works of Hans-George Gadamer, Martin Heidegger, and E. D. Hirsch. Particular attention is paid to the emergence of concepts of "his...more
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Youthful chemists Couper and Kekulé replaced radical and type theories with a new approach involving atomic valence and molecular structure, and based on the tetravalence and self-linking of carbon. Valence structures offered the first explanation for isomerism, and led to the invention of nomenclature, notation, and molecular models closely related to those in use today.
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Professor Sylvia Ceyer covers valence bond theory and hybridization in atomic molecules. A number of examples are used to depict sp3 hybridization, sp2 hybridization, and sp hybridization.
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This lecture explains what an economic model is, and why it allows for counterfactual reasoning and often yields paradoxical conclusions. Typically, equilibrium is defined as the solution to a system of simultaneous equations. The most important economic model is that of supply and demand in one market, which was understood to some extent by the ancient Greeks and even by Shakespeare. That model accurately fits the experiment from the last...more
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The cultural transition from the romantic era of consumption to the era of tuberculosis derived not only from the germ theory of disease and the triumph of contagionism over anticontagionism, but also from political considerations. Worries over population decline and growing working-class militancy were aggravated by what now appeared to be a social disease, or a disease of poverty. One of the strategies deployed against the disease was th...more
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An ancient disease, tuberculosis experienced a major upsurge in Western Europe in the nineteenth century, corresponding with increasing industrialization and urbanization. Poor air quality and cramped living conditions increased susceptibility to the disease. Tuberculosis also had a significant impact on European culture. In this respect, the modern career of the disease can be divided into two eras: the first associated with artistic roma...more
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Professor Sylvia Ceyer covers crystal field theory in both the tetrahedral case and the square planar case. The discussion then moves to the spectrochemical series and strong/weak field ligands. A conversation on magnetism, both paramagnetic and diamagnetic, in transition metals concludes the lecture.
