class05a - AST 309S The Solar System MWF 11-12 John Lacy R...

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AST 309S The Solar System MWF 11-12 John Lacy RLM 16.332, M-F 12-12:30 471-1469 lacy@astro.as.utexas.edu Amanda Bayless Daniel Kagan RLM 16.312, Th 10-12 RLM 15.202A, W 3-5 471-3462 232-3923 baylessa@astro.as.utexas.edu kagan@astro.as.utexas.edu class website: www.as.utexas.edu courses AST 309S username: AST password: 309
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Reading for this week Chapter 2: The Internal Structure of the Terrestrial Planets If you haven’t finished reading the chapter, keep working on it. If you have just skimmed it, look back at it, looking especially for the topics I talk about in class.
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Topics from chapter 2 definitions of energy, power, heat energy, kinetic energy, potential energy descriptions of core, mantle, crust, lithosphere, asthenosphere – where are they, what are their properties, what are they made of? ways that heat can be generated in a planet ways that heat can be transferred in a planet why larger planets retain heat better how planets become differentiated, with denser materials found nearer the center evidence that planets are differentiated
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Energy best defined by examples and formulas: energy of motion (kinetic energy): determined by an object’s speed and mass: ½ m v 2 heat energy: determined by an object’s temperature: kT x (number of atoms) (k is called Boltzmann’s constant) energy of position (potential energy): determined by an object’s height and mass mgh (g is a constant for the gravity on a planet)
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ABCD Quiz Two asteroids are headed for the Earth. Both have diameters of 100 m and are made of iron.
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This note was uploaded on 07/13/2010 for the course AST 309 taught by Professor Johnlacy during the Spring '08 term at University of Texas at Austin.

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class05a - AST 309S The Solar System MWF 11-12 John Lacy R...

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