Welcome to PHY101: Major Concepts in Physics I
Transcript of Welcome to PHY101: Major Concepts in Physics I
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WelcometoPHY101:MajorConceptsinPhysicsI
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Introduction
Coursewebsite:https://jmschwarztheorygroup.org/phy101/
Youcanaccessthesyllabus,courseschedule,homeworkassignments,homeworksolutions,labs,etc.onthecoursewebsite.
GradeswillbeaccessedviaBlackboard.
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Whatkindsofthingsarewegoingtolearnaboutinthiscourse?
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GameofThrones andprojectilemotion
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BreakingBadandelectromagnets
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BreakingBadandelectromagnets
AteaserforPHY102!
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PleasefillouttheGoogleformatthefollowinglink:
https://forms.gle/hdQSJL5oVo7yoMT28
Yourname
Whatisyourintended/projectedcareer?
Isyourintended/projectedcareerscience-based?
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•Whatisscience?
•Whatisphysics?
•Whattoolsdoyouneedtolearnphysics?
Today’sThreeQuestions
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•Whatisscience?
•Whatisphysics?
•Whattoolsdoyouneedtolearnphysics?
Today’sThreeQuestions
SeeChapter1oftextbook!
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•Whatisscience?Perhapsweshouldhaveaskedthisquestionbefore fillingoutthesurvey.•Whatisphysics?
•Whattoolsdoyouneedtolearnphysics?
Today’sThreeQuestions
SeeChapter1oftextbook!
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ActiveLearningExerciseWatchthevideoat:https://mediaplayer.pearsoncmg.com/assets/_frames.true/sci-OALG-1-1-1.a. Comeupwithatleast3explanations(crazyideas)forwhy
thepersonlivinginthishousehas12cameras.
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ActiveLearningExerciseWatchthevideo:
a. Comeupwithatleast3explanations(crazyideas)forwhythepersonlivinginthishousehas12cameras.
b.Howcanyoudecidewhichexplanationiscorrect?Youcanconductadditionalexperimentsbutyoucannottalktotheperson.Describetheexperimentsyouplantoperform.
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ActiveLearningExerciseWatchthevideo.
a.Comeupwithatleast3explanations(crazyideas)forwhythepersonlivinginthishousehas12cameras.
b.Howcanyoudecidewhichexplanationiscorrect?Youcanconductadditionalexperimentsbutyoucannottalktotheperson.Describetheexperimentsyouplantoperform.
c.Whatoutcomesoftheseexperimentsmightconvinceyouthatcertainexplanations(orallofthem)arenotcorrect?
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Science=DetectiveWork
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Who’syourfavoriteTVdetective?
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Who’syourfavoriteTVdetective?
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Who’syourfavoriteTVdetective?
ReginaKingasDetectiveLydiaAdamsinSouthland
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InvestigativeLearningScienceEnvironment
Credit:EugeniaEtkina
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Whatisscience?
• Scienceisthebodyofknowledgethatdescribestheorderwithinnatureandthecausesofthatorder
• ScienceisanactivitydedicatedtogatheringofknowledgeabouttheworldandorganizingandcondensingitintotestablelawsandtheoriesusingtheScientificMethod
TheScientificMethod
1) Observetheworldaroundyou2) Frameaquestionandformulateahypothesis3) Makeapredictionbasedontheyourhypothesis4) Testyourpredictionwithanexperiment5) Ifpredictionisfalsified, formulateanotherhypothesis;ifpredictionis
validated,makemorepredictions
PioneeroftheScientificMethod:Ibn al-Haytham (Alhazen,965-1039)
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ScienceversusPseudoscience
Ahypothesisisscientificonlyifitisfalsifiable!
“Nonumberofexperimentscanprovemeright;asingleexperimentcanprovemewrong.”–AlbertEinstein
Pseudosciencelacksevidenceandpositshypothesesthatarenotfalsifiable.
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AGoogleformquickpoll:https://forms.gle/vnXZqi6E5kbw7bK66
Whichofthefollowingisascientifichypothesis?
A.Matterisfilledwithundetectableparticles.B. TheMoonismadeofgreencheese.C. Therearethingswewillneverknowabout.D. Therearepartsoftheuniversethatwillneverbefoundbyhumans.
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AGoogleformquickpoll:https://forms.gle/vnXZqi6E5kbw7bK66
Whichofthefollowingisascientifichypothesis?
A.Matterisfilledwithundetectableparticles.B.TheMoonismadeofgreencheese.C. Therearethingswewillneverknowabout.D. Therearepartsoftheuniversethatwillneverbefoundbyhumans.
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Inscience
Experimentalevidencemustbereproducible,otherwiseitisnotvalid.
Anyonewouldcommitsfraudiscut-offfromthescientificcommunity.Therearenosecondchances.
Atheoryisasynthesisofalargebodyofinformationthatencompasseswell-testedandsupportedhypotheses.
Theoriesaswellasfactscanchange.
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Whatisphysics?It’sknowledgeofnature.
Whatisnature?It’smatterandit’senergy.Theyareindeedrelated.
Howdoesone“piece”ofmatterinteractwithanother“piece”ofmatterintermsofafewfundamentallaws?
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Matter:TheStandardModel
http://www.d0.fnal.gov/Run2Physics/WWW/results/fnal/NP/N04C
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WhenmatterinteractsI
http://www.particle.kth.se/fmi/kurs/PhysicsSimulation/Images/6b/fysikb1.jpg
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WhenmatterinteractsII
Http:/www.ics.uci.edu/eppstein/pix/natx/cubs/
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ActiveLearningExerciseWatchvideooftakingaglass(oratransparentplasticcup)andpouringicecoldwaterintoit.
a. Carefullyobservetheglassforafewminutes.Describewhatyouobserveinsimplewords.
b. Thinkofdifferentexplanations(crazyideas)fortheobservedpatterns.Trytodeviseasmanyexplanationsaspossible.
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InvestigativeLearningScienceEnvironment
Credit:EugeniaEtkina
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Whatdoesittaketolearnphysics?
Weneedaconcisewaytorepresentobservations.Sowriting anddrawingattheleveloflinesandarrowsisneeded.
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Whatdoesittaketolearnphysics?
Weneedaconcisewaytorepresentobservations.Sowritinganddrawingattheleveloflinesandarrowsisneeded.
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Whatdoesittaketolearnphysics?
Sincemathisaconcisewayofstatingscientificideas,itwillbeusefultoknowalittlemath.Itismerelyalanguagewithcertainrules.
xismultipliedbythefactorm.
Thetermsmxandbareaddedtogether.
bmxy +=
Consider:
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Whatdoesittaketolearnphysics?
Sincemathisaconcisewayofstatingscientificideas,itwillbeusefultoknowalittlemath.Itismerelyalanguagewithcertainrules.
Whatisthevolumeofaspherewithradiuscm?
Use: V =43πr3
Vr =1
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Whatdoesittaketolearnphysics?
Sincemathisaconcisewayofstatingscientificideas,itwillbeusefultoknowalittlemath.Itismerelyalanguagewithcertainrules.
Whatisthevolumeofaspherewithradiuscm?
Use: V =43πr3
Vr =1
V ∝ r3
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37
Dimensions arebasictypesofquantitiesthatcanbemeasuredorcomputed.Examplesarelength,time,mass,electriccurrent,andtemperature.
Aunit isastandardamountofadimensionalquantity.Thereisaneedforasystemofunits.SIunitswillbeusedthroughoutthisclass.
Whatdoesittaketolearnphysics?
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BaseDimensions/Units
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Ourfirstproblem:Aroughestimate
Howmanycellsarethereinthehumanbody?
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PHY101StudentPersonalSurvey
https://forms.gle/z4beToSe3mwoMpKA9