There is a latitudinal gradient of heat on the Earth caused by the tilt of the Earth's axis with respect to the sun. This tilt produces seasonal fluctuations in heat input from the sun, as well as an excess of heat received on average annually near the equator. Heat is transferred poleward by both the ocean and atmosphere in an attempt to balance the Earth's energy budget. The circulation of the Earth also causes a separation of the atmosp...more
After mentioning some legal implications of chirality, the discussion of configuration concludes using esomeprazole as an example of three general methods for producing single enantiomers. Conformational isomerism is more subtle because isomers differ only by rotation about single bonds, which requires careful physico-chemical consideration of energies and their relation to equilibrium and rate constants. Conformations have their own notat...more
This lecture is devoted to discussion of the wonderful Quantum world. Classical Mechanics, in spite of all of its impressive predictive power, fails to explain many microscopic behaviors. This led to the development of Quantum Mechanics, where electrons orbit nuclei in discrete energy levels, light can behave as a particle, and particles behave as waves. The location of microscopic particles can only be expressed in terms of probabilities....more
Professor Bailyn begins the class with a discussion of a recent New York Times article about the discovery of a new, earth-like planet. He then discusses concepts such as epicycles, dark energy and dark matter; imaginary ideas invented to explain 96% of the universe. The Anthropic Principle is introduced and the possibility of the multiverse is addressed. Finally, biological arguments are put forth for how complexity occurs on a cosmologic...more
Kepler's Laws, Elliptical Orbits, Change of Orbits, and the famous passing of a Ham Sandwich by astronauts in orbit. Kepler's three Laws summarize the motion of the planets in our solar system. Following Newton's law of universal gravitation, the conservation of angular momentum and mechanical energy allow us to calculate the semimajor axis of the elliptical orbits, the orbital period and other orbital parameters. All we have to know is on...more
A special event to mark the publication of Professor Barrow's new book, 'The Book of Universes'. This is a book about universes, a story that revolves around a single unusual and unappreciated fact: that Einstein’s famous theory of relativity describe universes – entire universes. Not many solutions of Einstein’s tantalizing universe equations have ever been found, but those that have are all very remarkable. Some of them describe universe...more
At the beginning, the product was an 'internet sponge' that could absorb information from a computer and be carried around on a keychain. As time went on, the idea went through lots of changes to become what the Hiptop is today. Hershenson describes the formation of the product as a critical mass process: enough stuff (people, money, time) gets scrunched together until the product comes out like a giant release of energy.
Professor Sylvia Ceyer discusses hybridization and chemical bonding. Using methyl nitrate as an example, Professor Ceyer describes how to find the lowest energy Lewis structure and explains bond symmetry, hybrid orbitals, and atomic orbitals. Moving onto intramolecular interactions, the discussion breaks down the origin of a bad hair day: hydrogen bonding, water, and keratin.
Find what you have a passion for and find a company that represents that, says Raikes. Life is too short to focus on money. Interviewers look for three things: high energy, high horse power, and the ability to get things done. It is nice to have relevant experience, but it is more important to be really passionate and willing to learn quickly, he adds.
Dominic Orr, CEO of Aruba Networks, wrestles with the definition of work-life balance for people who are deeply engaged by their work. Orr recognizes that it can be difficult to separate work and life but that we must still make room for relationships that matter to us and ultimately this comes down to carefully managing and allocating our time and energy.
Professor Sylvia Ceyer breaks down the Octet Rule covering molecules with an odd number of valence electrons, octet deficient molecules, and valence shell expansion. She concludes with ionic bonds as a classical model and mechanism discussing the Harpoon Mechanism, limitations of the model, and energy of interaction vs. the radius of an electron.
January 7, 2009 lecture by Lee Schipper for the Woods Energy Seminar (ENERGY301). In his talk "When the Rubber Hits the Road: The Real Story on Fuel Economy in the US and other Developed Countries, with Implications for Developing Asia," Schipper discusses better and more realistic fuel economy options in the US and other industrialized nations.