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Ap Physics 2 review Flashcards

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12281215465alpha decayA nuclear reaction in which an atom emits an alpha particle consisting of two protons and two neutrons. This increases the atomic number by 2 and the mass number by 4.0
12281222445beta decayradioactive decay of an atomic nucleus that is accompanied by the emission of a beta particle1
12281283404electron capturethe process in which an inner orbital electron is captured by the nucleus of the atom that contains the electron2
12281286861positron emmissionRadioactive decay in which a proton becomes a neutron and emits a positron (anti-electron)3
12286431674excited stateA state in which an atom has a higher potential energy than it has in its ground state4
12286437849ground stateThe lowest energy state of an atom5
12286444274What state is away from the nucleus?The excited state6
12286446655What happens to an atom after the energy is released from the excited state.the electron can relax by moving to a new energy level.7
12286458400If an electron is EXCITED, that means....energy is Absorbed, therefor a Photon can be absorbed.8
12286465434If an electron is DE-EXCITED, that means....energy is RELEASED and therefore a photon is released.9
12286476108What is the top number of an element??The mass number = number of protons + neutrons.10
12286483859What is the bottom number of an element??The atomic number = number of protons in the nucleus11
12286492667Energy-mass equivalencethe idea proposed in Albert Einstein's theory of relativity that states that mass is actually concentrated energy, as expressed by the equation E=mc2.12
12286494923binding energyThe energy needed to break up a nucleus into its constituent nucleons.13
12286499556mass defectthe difference between the mass of an atom and the sum of the masses of its protons, neutrons, and electrons14
12286510598AlphaEjected Helium15
12286511525BetaEjected Electron16
12286514539PositronEjected Anti-Beta particle17
12286519798GammaEjected Energy18
12286531271FusionCreation of energy by joining the nuclei of two hydrogen atoms to form helium.19
12286532846FissionA nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy20
12286567138total energyAll energy, potential and kinetic, within a specific system.21
12286571735Temperaturea measure of the average kinetic energy of the molecules of a substance. (like how fast the molecules are moving)22
12286572982Heatthe internal energy that is transferred between bodies in contact.23
12286576367Ideal Gas Lawthe relationship PV=nRT, which describes the behavior of an ideal gas24
12286594021The system boundarycontrols how the environment affects the system25
12286596224Closed to massmass can't get in or out26
12286597246closed to energyenergy can't get in or out27
12286598700First Law of ThermodynamicsEnergy can be transferred and transformed, but it cannot be created or destroyed. most commonly known as The Law of Conservation of Energy which really means that the total Energy, U of the universe remains constant!28
12286605094Isothermal Processconstant temperature29
12286606888Isobaric Processconstant pressure30
12286608524Isometric Processconstant volume31
12286610402Adiabatic ProcessA process in which no heat is transferred to or from the system by its surroundings.32
12286612061Done BY a gas33
12286612799Done ON a gas34
12286627450Second Law of ThermodynamicsEvery energy transfer or transformation increases the entropy of the universe.35
12289074642thermal contactrefers to energy transferred to a body by a means other than work.36
12289081372thermal equilibriumwhen two objects are at the same temperature and no heat flows37
12289088627Zeroth Law of ThermodynamicsA law that if two systems are separately found to be in thermal equilibrium with a third system, the first two systems are in thermal equilibrium with each other; that is, all three systems are at the same temperature. Also known as thermodynamic equilibrium.38
12289120835• Third Law of Thermodynamics-No system can reach absolute zero39
12289151065Avogadro's PrincipleEqual volumes of gas at the same temperature & pressure contain the same number of molecules40
12289176701Boyle's LawA principle that describes the relationship between the pressure and volume of a gas at constant temperature41
12289181164Charles' Lawthe law that states that for a fixed amount of gas at a constant pressure, the volume of the gas increases as the temperature of the gas increases and the volume of the gas decreases as the temperature of the gas decreases42
12289183249Gay-Lussac's Lawthe pressure of a gas is directly proportional to the Kelvin temperature if the volume is constant43
12289188862Combined LawCombining all the laws of a gas44
12289204461ConductionThe direct transfer of heat from one substance to another substance that it is touching.45
12289207579convectionThe transfer of heat by the movement of a fluid46
12289210315RadiationEnergy that is radiated or transmitted in the form of rays or waves or particles.47
12289573863heat enginea device that converts thermal energy into mechanical energy48
12289581988thermal efficiencythe efficiency of a heat engine measured by the ratio of the work done by it to the heat supplied to it.49
12289589346EntropyA measure of disorder or randomness.50
12289658213Densitythe degree of compactness of a substance.51
12289666561pressurethe amount of force exerted per unit area of a surface52
12289705665Atmospheric pressurethe pressure caused by the weight of the atmosphere. 16 pounds per square inch53
12290983816Pascal's principleThe force exerted by a fluid on the walls of its container always acts perpendicular to the walls.54
12291093954What is the force acting on you under water??The force acting on you is the weight of the water above you55
12291111784Pressure with depthincreases56
12291131732Archimedes' PrincipleAn object is buoyed up by a force equal to the weight of the fluid it displaces.57
12291147502Buoyancy in airAn object surrounded by air is buoyed up by a force equal to the weight of the air displaced.58
12291172378Laminar flow (AKA streamline flow)flow that is regular, smooth and predictable.59
12291184069turbulent flowIrregular flow with random variations in pressure.60
12291191620flow rateThe volume of fluid that moves through a system in a given period of time.61
12291218283Bernoulli's principal62
12291229643When the speed of a liquid increasesits internal pressure decreases.63
12291235726When the speed of a liquid decreasesIts internal pressure decreases64
12291254352Small tube of flowing waterlow pressure and high velocity65
12291258137Large tube of flowing waterHigh pressure and low velocity66
12291276374CurveballsThe turning ball drags some of the air with it, speeding it up. The faster-flowing air is at a lower pressure, so the ball moves that way. The rotation also directs the air in the opposite direction from the force — action and reaction.67
12291318792Moving air across the top of a hole, like a chimney, creates...A pressure difference, the wind on top is lower then the air in the chimney, causing the smoke to pump out of it.68
12291355906A low pressure moving fluid will...draw in particles of another fluid69
12293614267The carrier of electric charge isan electron70
12293623048An electron has what kind of charge?negative71
12293632041Charge isConserved. It isn't created or destroyed.72
12293652974Atoms are normally neutral becausethey have an equal number of negatively charge electrons and positively charged protons.73
12293669262Something with a negative charge hastoo many electrons74
12293682156Something with a positive charge hastoo few electrons75
12293717111Coulomb's Law76
12294069620If a pipe narrows, then speed of the liquide mustincrease77
12294078843If a pip widdens, then the speed of the liquid mustdecrease78
12294228820Fundamental law of static electricityLike charges repel and opposite charges attract79
12294238997Law of conservation of chargeCharge is not created or destroyed, merely transferred from one system to another.80
12294259171If you touch a charged object to an object with no charge,if the object is a conductor charge can flow onto it81
12294272670charge on a conductor will all be onThe outside82
13196197348How does a magnetic field flow on a magnet?Out of north and into south83
13196207042A current flowing through a wire creates what?A magnetic field84
13196218778A current flowing into the paper has a magnetic field flowing what way?Clockwise85
13196224089A current flowing OUT of the paper has a magnetic field flowing what way?counter clockwise86

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