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### Energy and change

Course: PHY 211, Fall 2011
School: Boise State
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Word Count: 282

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Energy explains Ed the five basic rules of Energy and Change EnergyandChange:thebasicfivelaws Law#1. An unbalanced force acting on a body results in a change in motion. Whatthismeans: the balancing scales will not moveuntilwe do what??? Apply a weight (an unbalanced force!) EnergyandChange:thebasicfivelaws Law#2: Objects remain stationary or in constant motion under the influence of balanced forces...

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Energy explains Ed the five basic rules of Energy and Change EnergyandChange:thebasicfivelaws Law#1. An unbalanced force acting on a body results in a change in motion. Whatthismeans: the balancing scales will not moveuntilwe do what??? Apply a weight (an unbalanced force!) EnergyandChange:thebasicfivelaws Law#2: Objects remain stationary or in constant motion under the influence of balanced forces Whatthismeans: The wheel will continue to spin and spin and spinuntilwhat??? We unbalance it (here, with brakes). Note that, once it stops, the wheel is once again in balance. EnergyandChange:thebasicfivelaws Law#3: Energy can be transferred from one medium to another. Whatthismeans:When we heat the potwhat happens? The energy from the fire is transferred the to water! EnergyandChange:thebasicfivelaws Law#4: Transfers of energy can vary according to the medium in which it travels. Whatthismeans:When you put a pencil into a glass of waterwhat happens? Thanks to the refracting property of water, the pencil appears to be bent! EnergyandChange:thebasicfivelaws Law#5: Energy is conserved when it is transferred or transformed Whatthismeans:When you turn on a bulb, you get energy in the form of light, but you get what other form of energy as well? Stumped? Then, do the experiment with your teacher! Thispowerpointwaskindlydonatedto www.worldofteaching.com http://www.worldofteaching.com Ishometowelloverathousandpowerpoints submittedbyteachers.Thisafreesite.Pleasevisitand Ihopeitwillhelpinyourteaching
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Boise State - PHY - 211
By the end of this unit you should :1. Know that energy is required for heating, lighting andoperating appliances.2. Know that energy can be supplied from electricity,gas oil,or solid fuel.3. Know that the cost of home heating depends on the fueland
Boise State - PHY - 211
Boise State - PHY - 211
Energy basicsTemperatureand HeatTemperature and heat areNOT THE SAME.TemperatureHow hot or cold it is.Measured in degrees Celsius.HeatThe amount of thermal energy,measured in joules or J.A cup of hot tea hasheat energy in theform of kinetic e
Boise State - PHY - 211
Nuclear ReactionsFission and FusionCS 4.4State that in fission a nucleus of large mass splits into 2nuclei of smaller mass numbers, usually with the releaseof neutrons.CS 4.5State that fission may be spontaneous or induced byneutron bombardment.C
Boise State - PHY - 211
Force DiagramsForces We know that a force can be a push or apull acting on an object There is a good chance that 2 forces canbe acting on an object at any one time Examples: Lifting something Dragging something Floating GlobeBalanced Forces If
Boise State - PHY - 211
FORCESWhat is a force?A force is an influence on asystem or object which, actingalone, will cause the motion of thesystem or object to change. If asystem or object at rest issubjected to a non-zero force itwill start to move.WeightWeight is a fo
Boise State - PHY - 211
The Left Hand Rule( for motors) shows what happens when chargedparticles (such as electrons in a current) enter a magnetic fieldThis rule is also called Fleming'sLeft Hand Rule, after Englishelectronics pioneerJohn Ambrose FlemingFirst finger repres
Boise State - PHY - 211
Types of EnergyY7 EnvironmentalProjectGEL 2007QUESTION?What do we need to move?ENERGYWhere do we get this energy from?FOODIn fact .NOTHING ould happenwwithoutENERGYENERGY IN ACTIONKINETIC ENERGYELECTRICAL ENERGYSOUND ENERGYHEAT &amp; LIGHT E
Boise State - PHY - 211
Defining the Atom All matter is composed of atoms Atoms are the smallest particle of an elementthat retains its identity in a chemical reaction. Atom comes from the Greek word atomosmeaning indivisible.Powerpoint hosted on www.worldofteaching.comPl
Boise State - PHY - 211
Q)Whichweighsmore:Akilogramoffeathersorakilogramofiron?DENSITYGEL2007What is Density?WhatIfyoutakethesamevolumeofdifferentsubstances,thentheywillweighdifferentamounts.WoodWaterIron1cm31cm31cm30.50g1.00g8.00gIRONQ)Whichhasthegreatestmassa
Boise State - PHY - 211
Boise State - PHY - 211
Energy, Force, and Motionidentifying energy transformations;Identifying and analyzing the transfer of heat energy by conduction,convection, and radiationinterpreting a phase diagram; describing and calculating velocity andacceleration;comparing Newt
Boise State - PHY - 211
Producing Electricity fromFossil Fuels and RenewableSourcesVisit www.worldofteaching.comFor 100s of free powerpointsGenerating ElectricityFor many years, we have generated electricity in much the same way:We can also use the heat from NUCLEAR REACT
Boise State - PHY - 211
FrictionFriction is a Force that always pushesagainst an object when it touchesanother objectWhen 2 things are in contact witheach other, there will be friction actingbetween themFriction High friction (lots of friction) will slowsomething down
Boise State - PHY - 211
Project GammaProjectBy Wylie Ballinger and Sam RussellVisit www.worldofteaching.comFor 100s of free powerpointsWhat are Gamma Rays?WhatThe most potent particlesTheon the electromagneticscale and the knownuniverse.universe.1 TeVTeV(1,000,000
Boise State - PHY - 211
Gas pressure &amp; volumeGasp X V = ConstantConstantFor example, suppose we have a theoretical gasForconfined in a jar with a piston at the top. Theinitial state of the gas has a volume equal to 4.0cubic meters and the pressure is 1.0 kilopascal.With
Boise State - PHY - 211
GravityWhat is it?http:/www.fi.edu/pieces/cych/apollo%2010/story/hoi/ball3.htmlhttp:/www.fi.edu/pieces/cych/apolloGravity isGravity is A natural force thatpulls all objectstoward the center ofthe earth.WHAT IS A FORCE?A pul l or apush on anob
Boise State - PHY - 211
Gravity and Circular MotionRevisionAQA syllabus ASection 13.3.1-6B.W.HughesBWH 10/04AQA113.3.1-6Circular motion When an object undergoes circular motion itmust experience acentripetal force This produces an accelerationtowards the centre of t
Boise State - PHY - 211
Guestimate that side Take your best guess at figuring out theRED side in question Without using a calculator! Number a piece of paper 1 to 5 Record your answers on a piece of paper175 N150100 N250275 N150100 N250 3.200 N500 4.200 N500
Boise State - PHY - 211
HEAT ENERGYHEATWhat is HEAT? Form of energy and measured in JOULES Particles move about more and take upmore room if heated this is why thingsexpand if heated It is also why substances change from:solidsliquidsgaseswhen heatedVisit www.worldof
Boise State - PHY - 211
Heat TransferMarch 20, 2007Warm-up Wrapa fur coat around a thermometer. Willits temperature rise? Explain why or why not. If you hold one end of a metal nail against apiece of ice, the end in your hand soonbecomes cold. Does cold flow from the ice
Boise State - PHY - 211
Force DiagramsForces We know that a force can be a push or apull acting on an object There is a good chance that 2 forces canbe acting on an object at any one time Examples: Lifting something Dragging something Floating GlobeBalanced Forces If
Boise State - PHY - 211
Chapter5UsingElectricityintheHomeVisit www.worldofteaching.comFor 100s of free powerpointsWork=force(Newtons)Xdistance(m)Inordertodoworkaforcemustmovethroughadistance.KineticenergyinvolvesmovementorusePotentialenergymeansthatitcanbeusedOnEarthwec
Boise State - PHY - 211
Chapter5UsingElectricityintheHomeVisit www.worldofteaching.comFor 100s of free powerpointsWork=force(Newtons)Xdistance(m)Inordertodoworkaforcemustmovethroughadistance.KineticenergyinvolvesmovementorusePotentialenergymeansthatitcanbeusedOnEarthwec
Boise State - PHY - 211
How LightningWorksLightning transfers electrons from the atmosphere to Earth.Electrons build up in clouds because wind causes them to rubtogether (Charging by friction).The negative charges in the clouds push the negative charges in the ground awayl
Boise State - PHY - 211
Infrared TelescopesAndrea, Scott, and MartnVisit www.worldofteaching.comFor 100s of free powerpointsInfraredwait what?!?!?Infrared is a certain region in the light spectrumRanges from .7 to 1000 or .1mmBroken into near, mid, and far infraredOne st
Boise State - PHY - 211
Standard Grade PhysicsHealth PhysicsThe Effects of Radiationon Living ThingsFrom this lesson and for the exam, you shouldbe able to: State that radiation can kill living cells or change the natureof living cells. State that radiation energy may be
Boise State - PHY - 211
Long leg isthe positive.Also available in thecolours GREEN andYELLOW.The FLAT side also indicateswhich leg is the negativeShort leg is the negative.Visit www.worldofteaching.comFor 100s of free powerpointsL.E.D.
Boise State - PHY - 211
Fun Physics You Can SeeLasers, Holograms and SpectroscopyVisit www.worldofteaching.comFor 100s of free powerpointsThe Inside Scoop on LightLight is a wave, kind of like a wave in the oceanThese light waves carry energy. This energy can do many inter
Boise State - PHY - 211
LIGHTRefraction Refraction Fact #1: As light goes from onemedium to another, the velocityCHANGES! Refraction Fact #2: As light goes from onemedium to another, the path CHANGES!Refraction Going from Air toWater If a light ray goes from a LOW refra
Boise State - PHY - 211
Boise State - PHY - 211
Mass, Force and Gravity Mass Amount of stuff (atoms/molecules) in anobject. Measured in kg. Force Measures the gravitational pull onsomething. Measured in N (newtons) Earths Gravitational Field Strength 10N/kg.(The gravitational field strength at th
Boise State - PHY - 211
WhatOn earth isthe MATTER?A.B.C. ?Whatin the world ismatter?Matter isA. Anything that movesB. Anything that takesup space.C. Something that cries.B.Anything thattakes up space!ThetypesOf matter areSolidsGasesLiquidsHow does matterc
Boise State - PHY - 211
Standard Grade PhysicsHealth PhysicsUsing Ionising Radiation in MedicineBy the end of this lesson, and for theexam, you should be able to: Describe one medical use of radiation based on thefact that that it can destroy cells (instrumentsterilisatio
Boise State - PHY - 211
Microwave TelescopesParvaneh, Shelby &amp; MarleenaVisit www.worldofteaching.comFor 100s of free powerpointsDiscovery(domestic use)Microwaves have wavelengths range fromcentimeters to those closer to a foot in length.Longer are for heating food.Short
Boise State - PHY - 211
MOTION What is motion ? What are the different types of motion? What is the physics relating to motioncalled? ok! we have answers to all these questions.1. what is motion?when a body iscontinuously changing itsposition with respect to thesurroun
Boise State - PHY - 211
Chapter 3Newtons LawNEXTVisit www.worldofteaching.comFor 100s of free powerpointsNewtons Laws3333Newtons First Lawx Law of InertiaNewtons Second Lawx F = maNewtons Third Lawx Action ReactionLaw of UniversalGmm'GravitationF=NEXTPREVIOU
Boise State - PHY - 211
Boise State - PHY - 211
P a rtic le m o d e lo fs o lid s ,liq uid s a nd gas e sVisit www.worldofteaching.comFor 100s of free powerpointsHow do materials conduct heatenergy?Uses of conductors and insulatorsUses of conductors and insulatorsLiq uid s a re p o o rc o nd uc
Boise State - PHY - 211
The SolarSystemandBeyondThe MoonVisit www.worldofteaching.comFor 100s of free powerpointsMrsGriffithsGravity also keeps the moon in orbit around theEarth. The moon orbits the Earth everymonth(28days)The moon is a natural satellite. A satellite
Boise State - PHY - 211
Reading position and time offa position vs time graphBasicpositionPosition vs timetimeWhere was the object locatedat 2 seconds?position5m4m3mAt 2 seconds theobject is located 2meters from thereference point2m1m0m0s1s2stime3s4s5sW
Boise State - PHY - 211
Position vs time graphsOf an object at restDescribe what the object is doingat 1 second, 2 seconds,3 seconds, etc.?position5m4mAt 1 seconds theobject is located 4meters from the origin3m2m1m0m0s1s2stime3s4s5sDescribe what the object
Boise State - PHY - 211
Interpreting position vs timegraphsStill pretty basic stuff Get 2 notecards One one index carddraw a solid line On another,draw a dashed lineSOLIDDASHED You will be asked a series of questionspertaining to a graph. On each graph, their will be
Boise State - PHY - 211
POWERPresentationbyK.RAJAIAHAGENDA2INTRODUCTIONWORK:Theworkdonebythetheforceisdefinedtobetheproductofcomponentoftheforceinthedirectionofthedisplacementandthemagnitudeofthisdisplacement.ThusOftenitisinterestingtoknownotonlytheworkdoneonanobject,b
Boise State - PHY - 211
PressureLearning Outcomesknow that pressure depends on bothforce and area.I can calculate the pressure under anyobject.http:/www.pstramway.com/video.aspPressureExperiment100gI think thebiggermass willsinkfurtherI think abigger areawill sto
Boise State - PHY - 211
PressureandMomentsMomentsPressureIn solidsIfaforceisappliedoverasmallersurfaceareayougetalargerpressure.Pressurecanbecalculatedusingthefollowingequation:NewtonsNm2Pascals or N/m2Pressure - In liquidsPressureincreaseswithdepth.Pressureactse
Boise State - PHY - 211
PROJECTILE MOTIONSenior High School PhysicsLech Jedral2006Part 1.Free powerpoints at http:/www.worldofteaching.comPart 2.Introduction ProjectileMotion:Motion through the air without a propulsion Examples:Part 1.Motion of Objects ProjectedHor
Boise State - PHY - 211
LearningObjectivesLearningObjectives Whowasinvolved? Whichexperimentswereusedtohelpusunderstand?Whatareatomiclinespectra?Whichmodelswereusedtorepresenttheatom?Whichequationsarefundamental?Whichonesarehandytoknow?!Whathavebeenthesuccessesofquantu
Boise State - PHY - 211
LearningObjectivesLearningObjectives Whowasinvolved? Whichexperimentswereusedtohelpusunderstand?Whatareatomiclinespectra?Whichmodelswereusedtorepresenttheatom?Whichequationsarefundamental?Whichonesarehandytoknow?!Whathavebeenthesuccessesofquantu
Boise State - PHY - 211
Nuclear ReactionsAlpha, Beta, and Gamma DecayCS 4.2State what is meant by alpha, beta and gamma decay ofradionuclides.CS 4.3Identify the processes occurring in nuclear reactionswritten in symbolic form.TheAtomThe atom consists of two parts:1. Th
Boise State - PHY - 211
Nuclear ReactionsRutherfords Alpha Scattering ExperimentCS 4.1Describe how Rutherford showed that:(a) The nucleus had a relatively small diametercompared with that of the atom.(b) Most of the mass of the atom is concentrated inthe nucleus.INTHEBEG
Boise State - PHY - 211
Sound and LightJenny CoxVisit www.worldofteaching.comFor 100s of free powerpointsWhy is the sky blue?andWhy are sunsets red?L aboratory: How Sound Travels Part I: Does sound travel through paper,plastic, metal, and water? Part II: Which medium d
Boise State - PHY - 211
SpectralLinesCelestialFingerprintingVisit www.worldofteaching.comFor 100s of free powerpointsGoalsGoals Fromlightwelearnabout Composition MotionContinuumSpectraTheSunAContinuumSpectrum:Lightemittedacrossacontinuousrangeofwavelengths.Atherma
Boise State - PHY - 211
SPHERICALMIRRORSFree powerpoints at http:/www.worldofteaching.comWhat is a sphericalSpherical mirrors are mirrors whosemirror? a part of a hollow sphere,surfaces formThe spheres can be made of glass or anypolished metal surfacesTypes of spherical
Boise State - PHY - 211
Conductors and InsulatorsOBJECTIVESByth e e nd o fth is le s s o nyo us h o uld kno w:1.T h a t Heat Energyflo ws fro m h ig h to lo wtemperatures.2.A Conductoris a m a te ria lth a ta llo ws h e a te ne rg yto flo wth ro ug h itq uic kly.S o m e
Boise State - PHY - 211
Simplestructure of the atomThe Atomic StructureELECTRONNegativeNEUTRONNoChargePROTONPositiveTwo positive protons and two negative electronsGain an electron to become negativeLose an electron to become positiveMore free powerpoints at http:/www.
Boise State - PHY - 211
TELECOMTELECOMSPEEDOFE.M.WAVES3x10 m/s3oo,ooo,ooom/s8TELECOMTELECOMSPEEDOFSOUNDWAVES340m/sinairTELECOMTELECOMEQUATIONSv=f/t/tv=dTELECOMTELECOMFrequency=thenumberofwavespersecondMeasuredinHertz(HZ)TELECOMTELECOMCARRIERWAVETHISTE
Boise State - PHY - 211