science final

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Terms in this set (78)
technologythe application of science to help peopletheoryan explanation of an event based on observations and experimentslawa statement that tells what happens in an eventtemperaturethe measure of the average kinetic energy of the atoms in an objectdensitythe mass per unit volume of a materialmodelsomething created to represent an ideagraphvisual display of information used to explain an idea or conceptspeeddistance an object travels over a period of timevelocitythe distance an object travels over time and the objects directionaccelerationthe change in velocity of an object over timegthe acceleration of a falling object due to gravity in a vacuum (9.8 m/s^2)momentuma property of an object based on the objects mass and velocityprojectileany object thrown/shot through the airgravitya force between any objects dependent on the mass of the objects, often refereed to a downward force on all objectsforcepush or pull on an objectbalanced forceequal forces but in opposite direction (Net Force-0)unbalanced forceforce that is grater in one direction (Net force- greater than 0)Net forceThe sum of all forces acting on an objectfrictionthe force that opposes the motion between 2 surfaces in contactvacuuman area without airair resistancethe friction caused by the force of air acting on an object opposing the object's motionterminal velocityhighest velocity a falling object will reach due to the forces of gravity and air resistance becoming balancedinertiathe resistance of an object to any change in its motion (Often talked about Newton;s 1st law of Motion)free fallan object falls free from air resistanceweightthe measurement of gravitational force on an objects masscentripetal forceforce from the center that makes an object move in a curved or circular pathmachinedevice to make work easierpowerthe rate at which work is doneefficiencythe measure of how much work is put into a machine is changed into useful work output by the machineideal machinea theoretical machine in which the amount of work put into the machine is equal to the amount of work you get out of the machinekinetic energyenergy of an object due to the object's motionpotential energythe energy of an object at rest, or energy stored by an objectcaloriea unit that measures the energy in foodthermal energytotal energy in an object, including both kinetic (temperature) and potential (mass)nuclear fusionthe production of energy from the collisions between the nuclei of atomsnuclear fissionthe production of energy from the splitting of uranium nucleifossil fuelsenergy sources found within the earth formed form the decay of plants and animals millions of years agorenewable energy resourceenergy sources that can be produced as quickly as they are usednon-renewable energy resourcesresources that are used up quicker than they can be madephotovoltaic cellsdevices that convert light energy to electricity (as seen in solar calculators)newtons first law of motionan object in motion will remain in motion unless acted upon by another forceNewton's 2nd Law of MotionThe acceleration of an object depends on the mass of the object and the amount of force applied.Newton's 3rd Law of MotionFor every action force there is an equal and opposite reaction forcelaw of conservation of energyenergy cannot be created nor destroyed, but can change formlengthmeter (m)masskgvolumecm3, mL, Ldensityg/mL g/cm3timesecond (s)temperatureKelvin (K)speedm/saccelerationm/s2forceNewtonsweightNewtonsWorkJoulesEnergyJoulesPowerWattsspeedd/taccelerationa=vf-vi/t a=f/mmomentump=mvforceF=maweightW=mgpowerP=W/t P=E/tworkW=FdefficiencyEff=Wout/Win 100mechanical advantageMA = Fout/FinvolumelwhdensityD=m/v