potential flow
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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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Adams talks about testing the viability of a new technology with potential customers. He recommends entrepreneurs conduct polls and surveys to determine whether there is demand for the technology in the market. Never commit to a large development effort without prototyping the technology first and taking it to a potential target market, he cautions.
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Ping Li, Partner at Accel, talks about how they evaluated Bit Torrent as a potential venture capital investment. Li suggests that Bit Torrent possessed three things which led to the eventual investment: 1) Deep, distinctive technology and a really meaningful problem, 2) A strong team that had proved a legitimate business model and 3) Shared vision about the future potential of the company.
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Dan Springer, CEO of Responsys, talks about the potential conflicts of interest between entrepreneurs and investors. Springer advises entrepreneurs to discuss these situations with venture investors in advance of making a deal so that all parties understand the potential outcomes upfront.
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Lets change the discount rates depending on how far out the payments are.
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Work needed to compress a spring is the same thing as the potential energy stored in the compressed spring.
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The movement of matter and energy around the planet is very important, and its study draws on geology, and meterology in addition to chemistry. Energy tends to flow upwards from plantlike producers to herbivores to carnivores before being decomposed by detritovores and cycling back into energy usable by producers, in addition to the photosynthesis or chemosynthesis used by producers to produce energy. Like energy, compounds vital to life s...more
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In this lecture, Professor Lewin displays how the conservation of mechanical energy can be used to derive the equation of motion for simple harmonic oscillators (SHO). In doing so he covers gravitational potential energy, equilibrium points where the net force is zero, parabolic potential energy, and circular potential energy.
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Byers explains that smaller companies need to pay extra attention on how they spend their cash because if they run out of cash, it is game over for them. Byers uses the example of Palm Inc. to show how well the company managed their cash flow.
