phase diagrams
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The ideal-gas law is introduced, and the rate of momentum transfer from the gas molecules to the vessel walls is related to pressure. The concepts of phase diagrams and phase transitions are also introduced, and they are explored with fire extinguishers, boiling water, and cooled balloons filled with air. The ideal-gas law holds (approximately) when you have only gas; it doesn't hold whenever there is any liquid present. Professor Lewin us...more
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Jung talks about the five different phases that a start-up will entail in its journey from inception to transition. Phase one is the start-up and the inception. Phase two is a period of growth. Phase three is the unfortunate setback that every venture will invariably face. Phase four is a stage for rejuvenation. The fifth and final phase is a transition for either you as an entrepreneur or the company overall, he says.
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Jung talks about the dark phase in a startup where entrepreneurs begin to question everything, including themselves. This is an important phase as it tests you, your own sense of perseverance and loyalty to yourself, he says. An entrepreneur has to be prepared for this phase as every company will eventually experience it, he cautions.
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It is important that chemists agree on notation and nomenclature in order to communicate molecular constitution and configuration. It is best when a diagram is as faithful as possible to the 3-dimensional shape of a molecule, but the conventional Fischer projection, which has been indispensable in understanding sugar configurations for over a century, involves highly distorted bonds. Ambiguity in diagrams or words has led to multibillion-d...more
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In this lecture, Professor Freeman explains the logic behind American and British military strategy during the early phases of the Revolution. First, she discusses the logistic disadvantages of the British during the war: the difficulties shipping men and supplies from more than three thousand miles away; the vast expanse of countryside with no one central target to attack; difficulties in recruiting British soldiers to fight in America; a...more
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Why work from expansion is the area under the curve of a PV-diagram.
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