QuickTime and a None decompressor are needed to see this picture. QuickTime and a None decompressor are needed to see this picture. Please find the card with your picture and name in the front of the room and write the following on it: 1. Preferred name (pronunciation if necessary) 2. Where you came from 3. Major/interests 4. Title of the last book you read (or favorite) 5. Some interesting fact about yourself to help me remember you Bring or pass your card forward Gus Hart N335 Eyring Science Center http://ps100.byu.edu http://msg.byu.edu QuickTime and a None decompressor are needed to see this picture. Welcome to Physical Science 100 Gus Hart Grant Hart Self Introduction Bro./Prof./Dr. Gus Hart N335 Eyring Science Center 422-7444 gus.hart@gmail.com (gus_hart@byu.edu) I took Physical Science 100 Beware of G. Hart
Before we start Any questions? Using the clicker 1. Take the paper tab out of the back 2. Register your clicker (your TA s will help you with this in your lab) 3. Each day set the channel on your clicker by pressing: Go 6 8 Go 4. Check on the PS100 homepage to make sure your grades are being recorded Which statement most applies to you? 1. I like science. I find it relatively easy. 2. I like science but it s somewhat difficult for me. 3. I like science but this class is irrelevant to me. 4. I don t like science and this class is irrelevant to me. Why do I have to take this class anyway?! Which statement best describes science as you see it? 1. Science is a way of learning about the universe. 2. Science is a collection of laws and theories. 3. Science is a description of the universe. 4. Science is a collection of facts learned by experimentation.
Summary of Chapter 1, Science, and the Universe 1. Sources of knowledge 2. The Scientific Method 3. Six Self-Evident Truths 4. The Universe around us Strength: Draws on historical experience and expert wisdom. Weakness: How do others know? How does one resolve conflicts?
Strength: Outside of our senses. From the ultimate authority? Weakness: Personal. Outside of science. Timing is outside our control Strength: Internally consistent. Public review. Avoids contradiction. Weakness: Assumptions may be false and hard to determine Pluto is 1. A comet 2. An asteroid 3. A planet 4. A dwarf planet Strength: Reproducible. Test for predictions Weakness: Limited scope. May be biased
How do you know Pluto is a dwarf planet? 1. Authority 2. Intuition 3. Reason 4. Sensory data Science in a nutshell Laws Physical phenomena Models Science seeks to understand, i.e., to be able to make predictions The six assumptions of Science Existence Once upon a time, I, Chaung Tsu dreamed I was a butterfly, flying happily here and there, enjoying life without knowing who I was. Suddenly I woke up and I was indeed Chuang Tsu. Did Chuang Tsu dream he was a butterfly or did the butterfly dream he was Chuang Tsu? There exists a physical world separate from and distinct from our minds which is comprehensible through our senses and which is governed by certain generalities called laws of nature.
Cause precedes effect Laws of physics are the same everywhere Galileo s experiment When two ideas contradict each other, at least one of the must be wrong. Otherwise, reason does not work.
The Universe Around Us Interactions and forces: 1. Gravity (depends on mass) 2. Electromagnetic (depends on charge) 3. Weak Nuclear Force 4. Strong Nuclear Force Ptolemaic model vs. Copernican model The Universe Around Us Interactions and forces: 1. Gravity (depends on mass) 2. Electromagnetic (depends on charge) 3. Weak Nuclear Force 4. Strong Nuclear Force Which force is the strongest? 1. Gravity 2. Electromagnetic 3. Weak Nuclear 4. Strong Nuclear 25% 25% 25% 25% Gravity Electromag WeakNuc StrongNuc 10
Which force affects daily life the most? 1. Gravity 2. Electromagnetic 3. Weak Nuclear 4. Strong Nuclear 25% 25% 25% 25% Is Global Warming Real? How do you know? How does your answer affect the way you live? Gravity Electromag WeakNuc StrongNuc 10 Please hand in your getting to know you card before you leave