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by: Jodi DeMassa

Physics100 PHYS 100

Jodi DeMassa
CSU Chico

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About this Document

Lynda Klein
Study Guide
Physics, Cosmology
50 ?




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This 4 page Study Guide was uploaded by Jodi DeMassa on Tuesday September 27, 2016. The Study Guide belongs to PHYS 100 at California State University Chico taught by Lynda Klein in Fall 2016. Since its upload, it has received 3 views. For similar materials see Cosmology in Physics at California State University Chico.


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Date Created: 09/27/16
Jodi DeMassa Physics 100 Notes Exam 1 What is the Universe? Dark matter Light Stars Life Planets Energy Gas Rocks Gravity Nuclear Electromagnetic radiation Vast Infinite Undefined Expanding Dark Quiet Violent Empty Invisible, small to us Earth is the midpoint of life from the sun Consistent with the rarest material in the universe Common sense: logical thinking, thoughts from society, family, experience, environment, your senses, education, income, age, time in history, sexuality Myth: common misconception of the world around them We write about something we don’t know about, but moral/ethical truths to help us explain the world around us Ex. In the begging (common sense is limited) Scientific cosmology: for anthropologists to make sense of the world thru the environment, people, relationships Astronomers and physicists-study origin and nature Astrophysical cosmology-storytelling sciences (historical) Usually about what will be discovered about what will happen Cosmology-seeks to understand timeless principles/what actually happened, predicts the future universe Just theories- need a consensus to separate an assumption while remaining open to future evidence (making/testing) People are afraid to test it out bc it’s just a theory What happens in a scientific revolution- Thomas Kuhn, The Structure of Scientific Revolutions questions whether science is actual progress bc it keeps changing Relativity isn’t completely encompassed by quantum physics, but covers the Newtonian physics May be covered by the superstring theory Truth and Beauty Inseparable? Cold Dark Matter Theory questions of existence, number of constellations in the universe, different temperature of heat radiation, density of universe depends on dark energy, empty space repels itself Using common sense from our intuition and Earth to the universe- can’t since things aren’t on our scale and we can’t use common sense for our universe Myth is Cosmology’s Native Language Joseph Campell- The Inner Reaches of Outer Space-need humanity's connection w consistency and knowing scientifically Huichol Indians of Mexico-believed that they weren’t born from divine beings in sky, but rooted from Earth, experience Grandfather Fire as ancestor Niels Bohr: founder of quantum mechanics, never speak more clearly than you can think, clear method of distinguishing dogmas from facts Egyptians-morality (reason for rebirth) pyramid - pointed to North Stars Others connected to other gods in the sky Visible all year in Egypt Launch Pharaoh's Soul by pointing at favorite stars Babylon astronomy- appearance of heavens to predict future, reveal proportions of good and evil, had geometric picture of heavens Greeks-spheres not flat, rhetor about gov sparked question Ancient Greece Invents the Geocentric Universe--substance which everything is made, substance conserved, not created, can’t be destroyed (Thales principle of conservation), wanted to expand concept of law to a phenomena Anaximander--student who came up with Physics, came up why things have certain characteristics, believed that gods weren’t always the cause Pythagoras-Sun, moon, planets, earth turned on central fire (fire corresponded to musical interval) Heraclitus--didn't want an explanation of where the universe came from currently, but what powers it all Fire is the hidden matter from a burst Plato--reasoning mathematical regularities, universe is a bunch of material/ideas smashed together, constantly change math and philosophy was more real Athenian democracy-excluded women and slaves, war against sparta, put socrates to death The Alexandrian Synthesis--Philip of Macedon (conqueror of Greece hired Aristotle to teach son, Alexander the Great), son took over Egypt, Alexandria named after him, first great research institute for science, literature, philosophy, art agriculture, other technologies Eratosthenes- measured circumference of the Earth Claudius Ptolemy- developed theory on planetary motion, greek schools (Hebrews translated the Bible), leaders of first Christian Church, used to develop greek idea, library destroyed, Rome fell, Greek science learning gone to Europe Dark Ages, 5th-11th century Vents in pyramids point to orion’s belt, sirius Bible, 7 days 1) Primeval waters 2) Firmament 3) Land and planets 4) Sun, moon, stars, time 5) Creatures of sea 6) Animals, man and woman 7) Rest Thales of Miletus *636-546 BCE--floating in water 611-547 BCE--free space 555-520 BCE--floating in air Scientific model--makes a prediction we have yet to see Easy to understand of a complex idea Matches the real world, taking data thru observation (data taking) Ordinary matter/energy-4.5% Dark matter-70% Dark energy-25% 1 star orbital give off UV (Lyman) 2 “”-visible radiation (Balmer) 3 ””-infrared (paschen) Mars has a largest volcano in the Universe Has the largest valley Nucleus in middle of an atom, electrons orbit it, orbitals allowed, numbered Electrons gains energy, moves away from nucleus When light is emitted, electron goes all around, bounces back in place Bounces against other atoms When it adds orbitals, light goes off Louis de Broglie (1920’s)- explained why certain orbits are allowed, think of orbital as a wave, electrons are probability clouds ,might be there Inference pattern-sent through two holes Erwin Schrodinger-electrons multitask, but in several places at once What makes a good model reproducible It matches real world observations, people try to prove it false, predict unseen phenomena, must be consistent with enlisting paradigms, come from different sciences, usually simpler model is right


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