PHYS 1441 – Section 501 Lecture #1AnnouncementsWho am I?Structure of MatterThe Standard ModelDØ Experiment at Fermilab TevatronSlide 7Information & Communication SourceEvaluation PolicyHomeworksAttendances and Class StyleWhy do Physics?Models, Theories and LawsWhat do we want from this class?Brief History of PhysicsUncertaintiesUncertainties cont’dSignificant FiguresSlide 19Needs for Standards and UnitsDefinition of Base UnitsPrefixes, expressions and their meaningsInternational Standard InstitutesHow do we convert quantities from one unit to another?Examples 1.3 & 1.4Estimates & Order-of-Magnitude CalculationsExample 1.5Some FundamentalsSome More FundamentalsDisplacement, Velocity and SpeedWednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu1PHYS 1441 – Section 501Lecture #1Wednesday, June 2, 2004Dr. Jaehoon YuToday’s homework is homework #1, due 6pm, next Wednesday!!•Who am I?•How is this class organized?•What is Physics?•What do we want from this class?•Brief history of physics•Chapter one–Uncertainties and Significant Figures–Standards and units–Estimates–Unit conversionsWednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu2Announcements•Reading assignment #1: Read and follow through all sections in appendix A by Wednesday, June 9–A-1 through A-9•There will be a quiz on Wednesday, June 9, on theseWednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu3Who am I?•Name: Dr. Jaehoon Yu (You can call me Dr. Yu)•Office: Rm 242A, Science Hall•Extension: x22814, E-mail: [email protected] •My profession:High Energy Physics (HEP)–Collide particles (protons on anti-protons or electrons on anti-electrons, positrons) at the energies equivalent to 10,000 Trillion degrees–To understand•Fundamental constituents of matter•Interactions or forces between the constituents•Creation of Universe (Big Bang Theory)–A pure scientific research activity•Direct use of the fundamental laws we find may take longer than we want but •Indirect product of research contribute to every day lives; eg. WWWWednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu4High Energy Physics Structure of Matter10-10m10-14m10-15m<10-18m10-9mMatter Molecule Atom NucleusuQuark<10-19mprotons, neutrons,mesons, etc.top, bottom,charm, strange,up, downCondensed matter/Nano-Science/ChemistryAtomic PhysicsNuclearPhysicsBaryon(Hadron)Electron(Lepton)10-2mWednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu5The Standard Model•Assumes the following fundamental structure:Directly observed in 2000Discovered in 1995Wednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu6DØ Experiment at Fermilab Tevatron•World’s Highest Energy proton-anti-proton collider –Ecm=1.96 TeV (=6.3x10-7J/p 13M Joules on 10-6m2)Equivalent to the kinetic energy of a 20t truck at a speed 80 mi/hrChicagoTevatronp p CDFDØWednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu7qTimeppqgK“parton jet” “particle jet” “calorimeter jet”hadronsCHFHEMHighest ET dijet event at DØHighest ET dijet event at DØ0.69 GeV, 472E0.69 GeV, 475E21T11THow does an Event Look in a Collider Detector?Wednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu8Information & Communication Source•My web page: http://www-hep.uta.edu/~yu/–Contact information & Class Schedule–Syllabus–Homework–Holidays and Exam days–Evaluation Policy–Class Style & Communication–Other information•Primary communication tool is e-mail: Register for PHYS1441-501-SUMMER04 e-mail distribution list as soon possible Instruction available in Class style & Communication–5 points extra credit if done by next Monday, June 7–3 points extra credit if done by next Wednesday, June 9•Office Hours: 5:00 – 6:00pm, Mondays and Wednesdays or by appointmentsWednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu9Evaluation Policy•Term Exams: 45%–Total of three term exams (6/23, 7/19 & 8/11)–Best two of the three will be chosen–Each will constitute 22.5% of the total–Missing an exam is not permissible unless pre-approved•No makeup test•You will get an F if you miss any of the exams without a prior approval•Lab score: 20% You must be enrolled in an 11 wk section!•Homework: 20%•Pop-quizzes: 15%•Extra credits: 10% of the total–Random attendances–Strong participation in the class discussions–Other many opportunities•Will be on sliding scale unless everyone does very well100%Wednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu10Homeworks•Solving homework problems is the only way to comprehend class material•An electronic homework system has been setup for you–Details are in the material distributed today and on the web–https://hw.utexas.edu/studentInstructions.html –Download homework #1 (1 problem), attempt to solve it, and submit it You will receive a 100% credit for HW#1–Roster will close next Wednesday, June 9•Each homework carries the same weight•The worst one of the homework scores will be dropped•Home work will constitute 20% of the total A good way of keeping your grades high•Strongly encouraged to collaborate Does not mean you can copyWednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu11Attendances and Class Style•Attendances: –Will be taken randomly–Will be used for extra credits•Class style:–Lectures will be on electronic media•The lecture notes will be posted on the web AFTER each class–Will be mixed with traditional methods–Active participation through questions and discussions are STRONGLYSTRONGLY encouraged Extra credit….Wednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu12Why do Physics?•To understand nature through experimental observations and measurements (Research)•Establish limited number of fundamental laws, usually with mathematical expressions•Predict the nature’s course⇒Theory and Experiment work hand-in-hand⇒Theory works generally under restricted conditions⇒Discrepancies between experimental measurements and theory are good for improvements⇒Improves our everyday lives, though some laws can take a while till we see amongst usExp.{Theory {Wednesday, June 2, 2004 PHYS 1441-501, Summer 2004Dr. Jaehoon Yu13Models, Theories and Laws•Models: A kind of analogy or mental image of a phenomena in terms of something
View Full Document
Unlocking...