Gravity 2, solar system, and planets
Gravity 2, solar system, and planets ETS 154 - M001
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ETS 154 - M001
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This 6 page Class Notes was uploaded by Mitchell Jones on Friday October 30, 2015. The Class Notes belongs to ETS 154 - M001 at Syracuse University taught by R. Hallas in Fall 2015. Since its upload, it has received 20 views. For similar materials see Interpretation of Film in Foreign Language at Syracuse University.
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Date Created: 10/30/15
Force Gravity 11 Newton 3 2rld law Fma Universal Law of Gravitation FGMmdquot2 Falling ma GMmdquot2 aGMdquot2 Powers of 10 10quotn10ntimes 10quotnl10quotn lOquotn 10Am l 0quotnm lOAn l 0Am l 0quotnm lOAnquotm10quotnm 10quot3kilo llt lOquot3milli m 10quot6mega M lOquot6micro p 10quot9giga G lOquot9nano n 10quot12tera T lOquot12pico p l milel6 km Parallax Stellar parallax star appear to change position Earth rotates around sun so you see stars from different locations in orbit Parallax angle p measure of distance to nearby star Angle you have to adjust telescope between its greatest periods is 2p 6 months apart Larger distance 1ess parallax Angles 1 degree60 arc minutes 1 60 arc seconds Stellar Parallax and Distance dparsec1parc sec 1 parsec 210A13 miles Solar System All planets orbit counterclockwise Elliptical orbits but practically a circle Nearly all planets rotate counterclockwise expect Venus Terrestrial Planets Mercury Venus Earth Mars Small in mass and size Made of rock and metal No rings few moons Jovian Planets Jupiter Saturn Uranus Neptune Large mass and size Mostly H and He Rings and many moons Asteroids Small rocky bodies orbit sun Mostly found in asteroid belt between Mars and Jupiter Comets Small icy bodies Found in Kuiper Belt Pluto does not fit characteristics dwarf planet Terrestrial Planets Metal core mantle rocky crust Earth Geological Activity Seismic waves caused by earthquakes help us determine internal structure Core is part liquid and hot Planets heated when formed Radioactive decay also heat up interior Cool down over time smaller planets cool faster Hot interior main driver for geological activity Volcanoes and plate tectonics and earthquakes pwaves Pwaves longitudinal waves travel through core Swaves stopped by core Volcanoes Molten rock from earth s interior reaches surface Release lava water vapor C02 N outgassing Atmosphere is a product of outgassing Plate Tectonics Lithosphere divided in tectonic plates that oat on mantle Convection causes tectonic plates to shift creates mountains valleys seas Magnetic Field Charged particles moving in molten electrically charged metal core creates mag Field Protects us from wind of charged particles coming from the sun Some get trapped close to poles cause auroras Protects atmosphere from being stripped away Atmosphere Protects from solar radiation Captures part of energy coming from sun and warms planet Visible light reaches earth UV and Xrays are absorbed Greenhouse gases capture heat and warm planet Moon No atmosphere No signs of present geo Activity Too small cooled too fast Density less than earth Probably resulted from big impact With a MarsEarth sized object Craters Impact mark left by asteroidcomet hitting surface Believed responsible for dinosaur extinction Geo Activity erases craters on earth Shaping Planet s Surface Impact of craters Volcano eruptions Disruption of planet s surface by tectonic plates Erosion by Winds water ice Mercury Smallest planet Similar to earth s moon No atmosphere No volcanic activity but signs of pat geo activity cooled fast Venus Earth sized Rotates clockwise Mars Thick atmosphere strong greenhouse effect Day and night extremely hot Air pressure same as 5 miles below earth s ocean About half size of earth Very thin atmosphere Temp below freezing 58 degrees F Most similar to earth Evidence of water ows in past and present
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