Physics 8.02TClass 1: OutlineWhy Physics?Why Study Physics?Why Study Physics?Why Study Physics?Why Study Physics?Why Studio Physics?Why The TEAL/Studio Format?Why The TEAL/Studio Format?Overview of TEAL/StudioPersonal Response System(PRS) Question:Physics ExperienceYour ResponsibilitiesTo Encourage Collaboration, Grades Are NOT Curved In 8.02:Honesty IssuesPhysics 8.02 StaffTextbooksCommon Questions & AnswersPhysics is not Math……but we use concepts from 18.02PRS Question:Math BackgroundDon’t Worry!So what physics do we learn in 8.02 anyway????What’s the Physics?8.02: Electricity and MagnetismToday: FieldsIn General, thenGravitational & ElectricScalar FieldsScalar Fields - ContoursFields are 3DVector FieldsVector Field ExamplesVector Field ExamplesVector Field ExamplesVector Field ExamplesVisualizing Vector Fields:Three MethodsVector Fields – Field LinesPRS Question:Vector FieldVector Fields – “Grass Seeds”PRS Questions:“Grass Seed” VisualizationsWeird Field ContestAnother Vector Field:Gravitational FieldExample Of Vector Field: GravitationExample Of Vector Field: GravitationIn Class ProblemFrom Gravitational toElectric FieldsElectric Charge (~Mass)Electric Force (~Gravity)Coulomb's LawCoulomb's Law: ExampleThe Superposition PrincipleElectric Field (~g)Superposition PrincipleSummary Thus FarPRS Question:Electric Field1P01 -Physics 8.02TFor now, please sit anywhere, 9 to a table2P01 -Class 1: OutlineHour 1:Why Physics?Why Studio Physics? (& How?)Vector and Scalar FieldsHour 2:Gravitational fieldsElectric fields3P01 -Why Physics?4P01 -Why Study Physics?Understand/appreciate nature• Lightning• Soap Films• Butterfly Wings• Sunsets5P01 -Why Study Physics?Electromagnetic phenomena led directly to Einstein’s discovery of the nature of space and time, see his paper ON THE ELECTRODYNAMICSOF MOVING BODIESA. Einstein June 30, 1905In the last class of the term before the review, we will explain to you how this comes about6P01 -Why Study Physics?• Understand/Appreciate Nature• Understand Technology§Electric Guitar§Ground Fault Interrupts§Microwave Ovens§Radio Towers7P01 -Why Study Physics?• Understand/Appreciate Nature• Understand Technology• Learn to Solve Difficult Problems• It’s Required8P01 -Why Studio Physics?9P01 -Why The TEAL/Studio Format?Problems with Large Lectures:Lecture/recitations are passiveNo labs Æ lack of physical intuition E&M is abstract, hard to visualizeTEAL/Studio Addresses Problems:Lectures Æ Interactive, Collaborative LearningIncorporates desk top experimentsIncorporates visualization/simulationsBottom Line: Learn More, Retain More, Do Better10P01 -Why The TEAL/Studio Format?By standard assessment measures, TEAL shows a factor of two increase in learning gains as compared to lecture/recitation format(see Dori and Belcher, “How Does TEAL Affect Student Learning of E&M Concepts?”, Journal of the Learning Sciences 14(2) 2004.) Bottom Line: Learn More, Retain More, Do Better11P01 -Overview of TEAL/StudioCollaborative LearningGroups of 3, Tables of 9You teach, you discuss, you learnIn-Class Problem SolvingDesktop ExperimentsTeacher-Student InteractionVisualizationsPRS Questions12P01 -Personal Response System(PRS) Question:Physics ExperiencePick up the nearest PRS(under the table in a holder)13P01 -Your ResponsibilitiesBefore Class: Read SummaryIn Class: (You must be present for credit)Problem Solving, Desktop Experiments, PRSAfter Class:Read Study Guide, Review VisualizationsHomework (Tuesdays 4:15 pm)Exams3 Midterms (45%) + Final (25%)14P01 -To Encourage Collaboration, Grades Are NOT Curved In 8.02:+ -A >=95 <95 & >=90 <90 & >=85B <85 & >=80 <80 & >=75 <75 & >=70C <70 & >=67 <67 & >=64 <64 & >=60D <60 & >=55 F <5515P01 -Honesty IssuesProblem Sets: Please work together BUT Submit your own, uncopied workIn Class Assignments:Must sign your own name to submitted workSigning another’s name is COD offensePRS:Use only your assigned PRSUsing another’s PRS is COD offense16P01 -Physics 8.02 StaffIncludes:LecturerDemo Group Graduate TAUGrad TAs17P01 -TextbooksRequired:“Introduction to E & M”Liao, Dourmashkin, and BelcherSupplemental (not required):Serway & Jewett 6thEdition; Giancoli; …Prefer something else? Let me know!Important: Find something you can read18P01 -Common Questions & Answers• Dysfunctional Group?• Must Miss Class?•Must Miss HW?• Must Miss Exam?• Tell Grad TA• Tell Grad TA• Tell Grad TA• Tell me ASAPExam dates & times are onlineDo NOT schedule early vacation departures, etc. without consulting these times!Any Questions?19P01 -Physics is not Math…20P01 -…but we use concepts from 18.02V=−∇EG•Gradients•Path Integrals•Surface Integrals•Volume IntegralsBAVd∆≡− ⋅∫EsGG0inSQdε⋅=∫∫EAGGwQdVρ=∫∫∫21P01 -PRS Question:Math Background22P01 -Don’t Worry!• For many this is new & I will introduce concepts before use (yell at me if not!)• Concepts are VERY important –mechanics are almost trivialMath introduction/review:A time will be scheduledPresentation slides will be posted23P01 -So what physics do we learn in 8.02 anyway????24P01 -What’s the Physics?8.01: Intro. to basic physics concepts: motion, force, energy, …How does matter interact?Four Fundamental Forces:Long range: Gravity (8.01 … Gen.Relativity)Short Range: Strong and WeakMid Range: Electromagnetic (8.02)25P01 -8.02: Electricity and MagnetismAlso new way of thinking…How do objects interact at a distance? Fields We will learn about E & M Fields: how they are created & what they effectBig Picture Summary:00000inBSCEencSCQddddtdddIdtεµµεΦ⋅= ⋅=−Φ⋅= ⋅= +∫∫ ∫∫∫ ∫EA E sBA B sGGGGGGGGwvwvMaxwellEquations:()q=+×FEvBGGGGLorentz Force:26P01 -Today: FieldsIn General, thenGravitational & Electric27P01 -Scalar Fieldse.g. Temperature: Every location has associated value (number with units)28P01 -Scalar Fields - Contours• Colors represent surface temperature• Contour lines show constant temperatures29P01 -Fields are 3D• T = T(x,y,z)• Hard to visualize Æ Work in 2D30P01 -Vector FieldsVector (magnitude, direction) at every point in spaceExample: Wind Velocity Vector Field31P01 -Vector Field ExamplesBegin with Fluid Flow32P01 -Vector Field ExamplesFlows With Sources(http://ocw.mit.edu/ans7870/8/8.02T/f04/visualizations/vectorfields/02-particleSource/02-ParticleSource_320.html)33P01 -Vector Field ExamplesFlows With
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