Phys 150 Lecture 11 Please sit together in pairs: –Onyema and Honglu –Alejandra and Sean –Chris and Lin –Rachel and Anwen –John F. and Mengyue –Walter.

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Phys 150 Lecture 11 Please sit together in pairs: –Onyema and Honglu –Alejandra and Sean –Chris and Lin –Rachel and Anwen –John F. and Mengyue –Walter and Melissa –Max and Zhongyun –Matthew and Anna –Amanda and Kaijun –Pauline and Erich –Jacob and Irfan –John W. and Michael –Jennifer and Jiayuan –Alexandra and Erica –Emmanuel and Dian –Robert and David –Andrew and Shiying

Phys 150 Lecture 12 Phys 150 – Physics of Societal Issues Professor Scott Willenbrock –Research interests in particle physics and finance Teaching Assistant: Mae Hwee Teo Intended for non-science majors interested in science in today’s world –No background required or assumed –Satisfies the Physical Sciences requirement of the Natural Sciences and Technology requirement of the General Education requirements –Satisfies the Quantitative Reasoning II requirement Textbook –Physics and Technology for Future Presidents by Richard Muller –DO NOT CONFUSE WITH Physics for Future Presidents by the same author – buy that one for your parents!

Phys 150 Lecture 13 Other required materials i>clicker –Register your i>clicker on the Phys 150 web page –Student ID = Net ID = your UIUC address (Net ID –Set i>clicker frequency to BB A basic calculator –Choose one with scientific notation (EE or EXP button)

Phys 150 Lecture 14 Why take this course? Modern science is essential to understanding and solving major societal issues –We will eventually run out of fossil fuels (oil, coal, natural gas). What alternative sources of energy make sense? –Burning fossil fuels emits carbon dioxide. How will this affect the Earth’s climate? –What are the benefits and risks of nuclear energy? What happened at Fukushima? Chernobyl? Three Mile Island? –What are the different kinds of nuclear weapons? Why are they hard to make? –What are the benefits and risks of medical imaging? How dangerous are different kinds of radiation? –What is an earthquake? A tsunami? Where does the Earth’s magnetic field come from? –How do spy satellites work? How about GPS satellites? Weather satellites?

Phys 150 Lecture 15 How to read the textbook First reading of Chapter BEFORE coming to lecture –Read like a novel, don’t get hung up on numbers or calculations Further reading of Chapter for studying material more carefully –Useful for homework Things that you can ignore: –Footnotes (although they are often interesting) –Sections labeled “Optional”

Phys 150 Lecture 16 What do I really need to know? Everything that the author tells you that you need to know –Unnecessary to memorize tables of numbers Everything that is covered in lecture (unless you are told otherwise) –Lectures contain material supplemental to the textbook One difference from the textbook: I will teach you how to work with and understand numbers

Phys 150 Lecture 17 Weekly assignments Read the Chapter BEFORE coming to Tuesday lecture. –Read like a novel Quiz (almost) every Tuesday at the beginning of class –Multiple choice questions based on the reading for the week Homework due the following Sunday at midnight –Multiple choice questions and written-answer questions

Phys 150 Lecture 18 Exams Exam 1 – Thursday, February 28, in class –Chapters 1-5 Exam 2 – Thursday, April 18, in class –Chapters 6-10 Final Exam – Tuesday, May 7, 7:00-10:00 PM –Chapters 1-10 Exams will have both multiple-choice and written-answer questions.

Phys 150 Lecture 19 Grading 60 pt (max): i>clicker - 3 points per lecture –Starting next Tuesday 100 points: Quizzes - 10 points each –Starting next Tuesday (Quiz on Chapter 1) 240 points: Homework – 20 points each –Homework 1 is due Monday at midnight 300 points: Exams 1 and 2 – 150 points each 300 points: Final Exam 1000 points total –A (>900), B (>800), C(>700), D(>600)

Phys 150 Lecture 110 Turn off all electronic devices Except for your i>clicker, of course This includes laptops, smartphones, etc. Violators will lose their 3 points for lecture participation

Phys 150 Lecture 111 Chapter 1 – Energy and Power Canister Chemical energy

Phys 150 Lecture 112 Chapter 1 – Energy and Power Canister Chemical energy 100 Tons TNT

Phys 150 Lecture 113 i>clicker question Which of these has the LEAST amount of energy per gram? A.TNT B.Chocolate Chip Cookies C.Ethanol D.Hydrogen

Phys 150 Lecture 114 Energy per gram TNT1 Chocolate chip cookies8 Ethanol10 Hydrogen40 Compared to TNT -TNT does not require Oxygen to burn, while the others do Balloon

Phys 150 Lecture 115 Energy per gram TNT1 Chocolate chip cookies8 Ethanol10 Hydrogen40 Compared to TNT Balloon Fukushima 2011 Hindenburg TNT does not require Oxygen to burn, while the others do

Phys 150 Lecture 116 Energy per gram Car battery0.05 Computer battery0.15 Chocolate chip cookies8 Coal10 Ethanol10 Gasoline15 Natural gas (methane)20 Hydrogen40 Uranium million Compared to TNT

Phys 150 Lecture 117 Explosions Cannon Rapidly expanding hot gas

Phys 150 Lecture 118 Explosions Cannon Rapidly expanding hot gas Comet Shoemaker-Levy

Phys 150 Lecture 119 Explosions Extinction of dinosaurs 65 million years ago Kinetic energy = energy of motion = ½ mv 2