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Lecture12 - Big Bang Black Holes No Holes No Math ASTR/PHYS...

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Big Bang, Black Holes No Math Holes, No Math ASTR/PHYS 109 Dr. David Toback Lecture 11 & 12 Physics We Need Topic 4: Nuclear Physics & Chemistry Big Bang, Black Holes, No Math 1
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Prep for Today (Is now due) – L12 Reading: BBBHNM 9 End-of-Chapter Quizzes: Chapter 7 Reading questions: Two questions from Chapter 9 Paper 1: Working on Revisions if necessary Physics We Need Topic 4: Nuclear Physics & Chemistry Big Bang, Black Holes, No Math 3
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Paper 1 Stuff – L12 Check if you are grading fairly: Count the number of no’s in your Rubric 5 no’s? Count the number of nos in your Rubric. 5 nos? Can’t be a “great paper” and receive a 9. Were you misgraded? Send us an email ASAP and ’ll l k we’ll look Got an email from me saying you didn’t get a passing grade this time? CPR Revision is now open Due Friday at noon Only doing Phase II and III Ask for help if you need Physics We Need Topic 4: Nuclear Physics & Chemistry Big Bang, Black Holes, No Math 4
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Paper 2 Stuff – L12 Paper 2: After we finish Chapter 8 Diff Ph h l i Different Phases than last time Phase I: Optional If you want feedback, you need to turn in a draft on eLearning by Friday at noon Phase II: Due Next Wednesday Phase III: Due the following Wednesday Physics We Need Topic 4: Nuclear Physics & Chemistry Big Bang, Black Holes, No Math 5
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Overview of the story Big things are made from LOTS of small things Small things: The Fundamental Building Blocks of Nature What is the “stuff” in atoms Last ElectroMagnetism (electric charge) What holds electrons and protons together Quantum Mechanics Why atoms form the way they do Lecture Electron in orbits Atoms absorbing and emitting photons (light) Different TYPES of Atoms The Strong Force Keeping protons and neutrons together (atomic nuclei) Nuclear Physics and Chemistry Different atoms Different light… This Lecture Studying the Stars using their light Spectral lines of the atoms Atomic “fingerprints” The light we see from the stars Physics We Need Topic 4: Nuclear Physics & Chemistry Big Bang, Black Holes, No Math 10
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Smaller Building Blocks of Nature Atoms are made of a nucleus surrounded by electrons Many types of nuclei Only one kind of electron Nuclei is composed of neutrons and protons Neutrons and protons are two different types of nucleons Nucleons are made of quarks Physics We Need Topic 4: Nuclear Physics & Chemistry Big Bang, Black Holes, No Math 11
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Different energy levels for each different type of atom Fingerprinting the different atoms Hydrogen Helium Boron Can use light of different energies t id tif t Diff t C l Physics We Need Topic 4: Nuclear Physics & Chemistry Big Bang, Black Holes, No Math 19 to identify atoms: Different o o r s
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Atomic Fingerprints Each atom produces a large number of different wavelengths with VERY SPECIFIC values Quantum Mechanics di t ALL f th predicts ALL of them
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